Expires:202607261100;;612383 FPUS53 KFSD 260330 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 1029 PM CDT Sat Jul 25 2026 SDZ040-261100- Brookings- Including the city of Brookings 1029 PM CDT Sat Jul 25 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SUNDAY... .OVERNIGHT...Mostly cloudy with a chance of showers and thunderstorms. Some thunderstorms may be severe late this evening. Lows in the lower 70s. West winds 10 to 15 mph, becoming south 5 to 10 mph. Chance of rain 50 percent. .SUNDAY...Partly sunny. Hot with highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 104 in the afternoon. .SUNDAY NIGHT...Mostly clear. Humid with lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph, becoming west after midnight. Heat index values up to 105 early in the evening. .MONDAY...Sunny. Less humid with highs in the lower 90s. North winds 10 to 15 mph with gusts up to 25 mph. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 70. Northeast winds 5 to 10 mph. .TUESDAY...Mostly sunny. Highs around 90. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. .WEDNESDAY...Sunny. Highs around 90. .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 60s. .THURSDAY...Mostly sunny. A chance of showers in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. .FRIDAY...Mostly sunny. Highs in the mid 80s. .FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. .SATURDAY...Sunny. Highs in the mid 80s. $$