Subj : [1/2] Southern Ontario Weather To : All From : Northern Realms Date : Tue Sep 23 2025 05:05:00 FPCN11 CWTO 230900 Forecasts for Southern Ontario and the National Capital Region issued by Environment Canada at 5:00 a.m. EDT Tuesday 23 September 2025 for today and Wednesday. The next scheduled forecast will be issued at 11:00 a.m. EDT. City of Toronto. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 5 or moderate. Windsor - Leamington - Essex County. Today..Mainly cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 24. Humidex 28. UV index 6 or high. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 28. UV index 2 or low. Chatham-Kent - Rondeau Park. Today..Mainly cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 24. Humidex 28. UV index 5 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 28. UV index 2 or low. Sarnia - Petrolia - Western Lambton County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 24. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 28. UV index 2 or low. Watford - Pinery Park - Eastern Lambton County. Today..Mainly cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 24. Humidex 28. UV index 5 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 28. UV index 2 or low. Rodney - Shedden - Western Elgin County. Today..Mainly cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 23. Humidex 27. UV index 5 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 18. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the morning and in the afternoon. Temperature steady near 19. Humidex 26. UV index 2 or low. St. Thomas - Aylmer - Eastern Elgin County. Today..Mainly cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 23. Humidex 27. UV index 5 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 18. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the morning and in the afternoon. Temperature steady near 19. Humidex 26. UV index 2 or low. Strathroy - Komoka - Western Middlesex County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 23. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the morning and in the afternoon. High 21. Humidex 27. UV index 2 or low. London - Parkhill - Eastern Middlesex County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 23. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the morning and in the afternoon. High 21. Humidex 27. UV index 2 or low. Simcoe - Delhi - Norfolk. Today..Mainly cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 2 or low. Dunnville - Caledonia - Haldimand. Today..Mainly cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 23. Humidex 29. UV index 2 or low. Woodstock - Tillsonburg - Oxford County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. Wind southwest 20 km/h becoming light early this morning. High 23. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the morning and in the afternoon. High 20. Humidex 27. UV index 2 or low. Brantford - County of Brant. Today..Cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 27. UV index 2 or low. Niagara Falls - Welland - Southern Niagara Region. Today..Mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 5 or moderate. Tonight..Mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 28. UV index 2 or low. St. Catharines - Grimsby - Northern Niagara Region. Today..Mainly cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 5 or moderate. Tonight..Partly cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 28. UV index 2 or low. City of Hamilton. Today..Cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm late this afternoon. Wind southwest 20 km/h becoming light early this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening and after midnight. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 26. UV index 2 or low. Burlington - Oakville. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Halton Hills - Milton. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Mississauga - Brampton. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Caledon. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Vaughan - Richmond Hill - Markham. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 27. UV index 4 or moderate. Newmarket - Georgina - Northern York Region. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 27. UV index 4 or moderate. Pickering - Oshawa - Southern Durham Region. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Uxbridge - Beaverton - Northern Durham Region. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 27. UV index 4 or moderate. Goderich - Bluewater - Southern Huron County. Today..Cloudy. 30 percent chance of showers early this morning. 60 percent chance of showers late this afternoon. Risk of a thunderstorm late this afternoon. High 23. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 27. UV index 2 or low. Wingham - Blyth - Northern Huron County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 27. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 27. UV index 2 or low. Stratford - Mitchell - Southern Perth County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 27. UV index 2 or low. Listowel - Milverton - Northern Perth County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 22. Humidex 27. UV index 2 or low. Kitchener - Cambridge - Region of Waterloo. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 25. UV index 5 or moderate. Guelph - Erin - Southern Wellington County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 25. UV index 5 or moderate. Mount Forest - Arthur - Northern Wellington County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 20. Humidex 25. UV index 5 or moderate. Orangeville - Grand Valley - Southern Dufferin County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Shelburne - Mansfield - Northern Dufferin County. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 26. UV index 4 or moderate. Innisfil - New Tecumseth - Angus. Today..Cloudy. 60 percent chance of showers late this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the afternoon. High 21. Humidex 28. UV index 4 or moderate. Saugeen Shores - Kincardine - Southern Bruce County. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 14. Wednesday..Cloudy with 40 percent chance of showers and risk of a thunderstorm. High 20. Humidex 26. UV index 2 or low. Bruce Peninsula - Sauble Beach - Tobermory. Today..Cloudy. 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm this afternoon. Fog patches dissipating this morning. High 21. Humidex 25. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm early this evening. Low 14. Wednesday..Cloudy with 60 percent chance of showers and risk of a thunderstorm. High 20. Humidex 26. UV index 2 or low. Hanover - Dundalk - Southern Grey County. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy with 40 percent chance of showers and risk of a thunderstorm. High 19. UV index 4 or moderate. Owen Sound - Blue Mountains - Northern Grey County. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy with 40 percent chance of showers and risk of a thunderstorm. High 19. UV index 4 or moderate. Barrie - Collingwood - Hillsdale. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 20. Humidex 26. UV index 5 or moderate. Midland - Coldwater - Orr Lake. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 20. Humidex 26. UV index 5 or moderate. Orillia - Lagoon City - Washago. Today..Cloudy. 40 percent chance of showers this afternoon with risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 20. Humidex 26. UV index 4 or moderate. Cobourg - Colborne - Western Northumberland County. Today..Cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Overcast. Low 17. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 30. UV index 2 or low. Belleville - Quinte West - Eastern Northumberland County. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Overcast. Low 17. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 30. UV index 2 or low. Picton - Sandbanks Park. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Overcast. Low 17. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 30. UV index 2 or low. Napanee - Consecon. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Overcast. Low 17. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 30. UV index 2 or low. Kingston - Odessa - Frontenac Islands. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 23. Humidex 28. UV index 4 or moderate. Tonight..Overcast. Low 17. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 29. UV index 2 or low. Lindsay - Southern Kawartha Lakes. Today..Cloudy. 30 percent chance of showers early this morning. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. Fog patches dissipating this morning. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. Humidex 27. UV index 2 or low. Fenelon Falls - Balsam Lake Park - Northern Kawartha Lakes. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. Fog patches dissipating this morning. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. Humidex 27. UV index 2 or low. Peterborough City - Lakefield - Southern Peterborough County. Today..Cloudy. 30 percent chance of showers early this morning. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. Fog patches dissipating this morning. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 21. Humidex 26. UV index 2 or low. Apsley - Woodview - Northern Peterborough County. Today..Cloudy. 30 percent chance of showers early this morning. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. Fog patches dissipating this morning. High 23. Humidex 28. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 15. Wednesday..Cloudy. 60 percent chance of showers in the afternoon with risk of a thunderstorm. High 19. UV index 2 or low. Stirling - Tweed - Madoc. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm this afternoon. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy. 40 percent chance of showers this evening. Risk of a thunderstorm early this evening. Low 18. Wednesday..Cloudy. 60 percent chance of showers in the afternoon. High 23. Humidex 29. UV index 2 or low. Tamworth - Sydenham - South Frontenac. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy. 40 percent chance of showers this evening. Risk of a thunderstorm early this evening. Low 17. Wednesday..Cloudy. 60 percent chance of showers in the afternoon. High 23. Humidex 30. UV index 2 or low. Kaladar - Bannockburn - Bon Echo Park. Today..Cloudy with 40 percent chance of showers. Risk of a thunderstorm late this afternoon. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 15. Wednesday..Cloudy with 30 percent chance of showers. High 23. Humidex 29. UV index 2 or low. Bancroft - Hastings Highlands - Denbigh. Today..Cloudy. 40 percent chance of showers this afternoon. Risk of a thunderstorm late this afternoon. Fog patches dissipating this morning. High 21. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Low 13. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 20. Humidex 25. UV index 2 or low. Gananoque - Mallorytown. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy. 40 percent chance of showers this evening. Risk of a thunderstorm early this evening. Low 16. Wednesday..Cloudy. 60 percent chance of showers in the afternoon. High 22. Humidex 28. UV index 2 or low. Brockville - Prescott. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm early this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy. Low 16. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 22. Humidex 28. UV index 2 or low. Westport - Charleston Lake. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm. High 22. Humidex 27. UV index 4 or moderate. Tonight..Cloudy. 40 percent chance of showers this evening. Risk of a thunderstorm early this evening. Low 16. Wednesday..Cloudy. 60 percent chance of showers in the afternoon. High 22. Humidex 28. UV index 2 or low. Merrickville-Wolford - Kemptville. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm early this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy after midnight. Low 16. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 22. Humidex 28. UV index 2 or low. Ottawa North - Kanata - Orl‚ans. Today..Cloudy. 70 percent chance of showers changing to 30 percent chance of showers this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy near midnight. Low 15. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 24. Humidex 29. UV index 2 or low. Ottawa South - Richmond - Metcalfe. Today..A few showers ending this morning then cloudy with 30 percent chance of showers. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy near midnight. Low 16. Wednesday..Cloudy. 30 percent chance of showers in the afternoon. High 24. Humidex 29. UV index 2 or low. Gatineau. Today..Cloudy with 30 percent chance of showers. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy. Low 15. Wednesday..Mainly cloudy. 30 percent chance of showers in the afternoon. High 23. Humidex 28. UV index 5 or moderate. Prescott and Russell. Today..Cloudy. 70 percent chance of showers changing to 30 percent chance of showers this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Low 17. Wednesday..Becoming cloudy in the morning. 30 percent chance of showers in the afternoon. High 23. Humidex 28. UV index 2 or low. Morrisburg - Long Sault. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm early this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy after midnight. Low 18. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 21. Humidex 26. UV index 2 or low. Cornwall - Lancaster. Today..Cloudy. 40 percent chance of showers early this morning. A few showers beginning this morning changing to 40 percent chance of showers later this morning. Risk of a thunderstorm early this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy after midnight. Low 16. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 20. Humidex 26. UV index 2 or low. Winchester - Newington. Today..A few showers ending this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm early this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy after midnight. Low 15. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 22. Humidex 27. UV index 2 or low. Maxville - Alexandria. Today..Cloudy. A few showers this morning then 40 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm this morning. Fog patches dissipating this morning. High 22. Humidex 27. UV index 4 or moderate. Tonight..Partly cloudy. Becoming cloudy after midnight. Low 15. Wednesday..Cloudy. 40 percent chance of showers in the afternoon. High 22. Humidex 27. UV index 2 or low. Plevna - Sharbot Lake - Western Lanark County. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm late this afternoon. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 15. Wednesday..Cloudy with 30 percent chance of showers. High 22. Humidex 27. UV index 2 or low. Smiths Falls - Perth - Eastern Lanark County. Today..A few showers ending early this morning then cloudy with 40 percent chance of showers. Risk of a thunderstorm late this afternoon. High 22. Humidex 27. UV index 4 or moderate. Tonight..Mainly cloudy. 40 percent chance of showers this evening with risk of a thunderstorm. Low 16. Wednesday..Cloudy with 30 percent chance of showers. High 22. Humidex 27. UV index 2 or low. Port Carling - Port Severn. Today..Cloudy. 60 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm this afternoon. Fog patches dissipating this morning. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 17. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the afternoon. Temperature steady near 19. Humidex 26. UV index 5 or moderate. Bracebridge - Gravenhurst. Today..Cloudy. 60 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm this afternoon. Fog patches dissipating this morning. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the afternoon. High 22. Humidex 26. UV index 5 or moderate. Town of Parry Sound - Rosseau - Killbear Park. Today..Cloudy. 60 percent chance of showers late this morning and this afternoon. Risk of a thunderstorm this afternoon. Fog patches dissipating this morning. High 22. Humidex 26. UV index 4 or moderate. Tonight..Cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Low 16. Wednesday..Mainly cloudy with 60 percent chance of showers. Risk of a thunderstorm late in the afternoon. High 22. Humidex 26. UV index 5 or moderate. 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