Expires:202607240300;;481528 FPUS53 KFSD 231930 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 229 PM CDT Thu Jul 23 2026 SDZ064-240300- Douglas- Including the cities of Armour, Corsica, and Delmont 229 PM CDT Thu Jul 23 2026 .TONIGHT...Cloudy. Showers with a slight chance of thunderstorms this evening, then scattered showers after midnight. Lows in the lower 60s. Southeast winds 10 to 15 mph. Chance of rain 90 percent. .FRIDAY...Mostly cloudy in the morning, then clearing. Much warmer. Humid with highs in the upper 80s. South winds 10 to 15 mph. .FRIDAY NIGHT...Mostly clear. Humid with lows in the upper 60s. South winds 10 to 15 mph. .SATURDAY...Sunny, warmer with highs around 100. Southwest winds 5 to 10 mph. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 70s. South winds 10 to 15 mph. Heat index values up to 103 early in the evening. .SUNDAY...Mostly sunny. Hot with highs around 100. .SUNDAY NIGHT...Mostly clear. Lows in the lower 70s. Heat index values up to 105 early in the evening. .MONDAY...Sunny, hot with highs in the upper 90s. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. Heat index values in the upper 90s early in the evening. .TUESDAY...Partly sunny. Highs in the mid 90s. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 60s. .WEDNESDAY...Partly sunny in the morning, then clearing. Highs in the lower 90s. .WEDNESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. .THURSDAY...Mostly sunny. Highs in the lower 90s. $$