Expires:202607261200;;614565 FPUS53 KFSD 260421 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 1120 PM CDT Sat Jul 25 2026 SDZ057-261200- Brule- Including the cities of Chamberlain and Kimball 1120 PM CDT Sat Jul 25 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SUNDAY... .OVERNIGHT...Mostly cloudy with a chance of showers. A slight chance of thunderstorms. Some thunderstorms may be severe late this evening. Lows in the lower 70s. Northeast winds 10 to 15 mph, becoming southeast. Chance of rain 40 percent. .SUNDAY...Partly sunny with a slight chance of showers in the morning, then sunny in the afternoon. Hot with highs in the upper 90s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Heat index values up to 108 in the afternoon. .SUNDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the lower 70s. North winds 5 to 10 mph. Heat index values up to 108 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Northeast winds 5 to 10 mph, becoming east with gusts up to 20 mph in the afternoon. .MONDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 20 percent. .TUESDAY...Mostly sunny. Highs in the lower 90s. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. .WEDNESDAY...Mostly sunny. Highs in the mid 90s. .WEDNESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 40 percent. .THURSDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. .THURSDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 40 percent. .FRIDAY...Mostly sunny. Highs in the upper 80s. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s. .SATURDAY...Mostly sunny. Highs around 90. $$