SIOUX FALLS SiouxFallsWeather.com

Thursday, September 3, 2026

Zone Forecast Product

.TODAY...Partly sunny this morning, then clearing. Highs in the lower 90s. South winds around 10 mph with gusts up to 20 mph. Heat index values in the upper 90s this afternoon. .TONIGHT...Mostly clear. Humid with lows in the upper 60s. Southeast winds 5 to 10 mph. .FRIDAY...Sunny with highs in the lower 90s. East winds 5 to 10 mph. .FRIDAY NIGHT...Mostly clear. Humid with lows in the lower 70s. Southeast winds 5 to 10 mph. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. Southeast winds 10 to 15 mph. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows around 70. Chance of rain 40 percent. .SUNDAY...Mostly sunny. Highs in the upper 80s. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent. .LABOR DAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers in the morning. Highs in the mid 80s. Chance of rain 50 percent. .MONDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms after midnight. Lows around 70. Chance of rain 50 percent. .TUESDAY...Mostly cloudy in the morning, then becoming mostly sunny. Highs in the mid 80s. .TUESDAY NIGHT...Partly cloudy. Lows in the lower 60s. .WEDNESDAY...Mostly sunny. Highs in the lower 80s.