SIOUX FALLS SiouxFallsWeather.com

Wednesday, September 16, 2026

Zone Forecast Product

.TODAY...Mostly sunny this morning, then mostly cloudy with a chance of sprinkles this afternoon. Highs in the upper 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph. .TONIGHT...Mostly cloudy. A chance of sprinkles in the evening. Lows in the upper 50s. Southeast winds 5 to 10 mph, becoming southwest after midnight. .THURSDAY...Mostly cloudy. Highs in the mid 70s. Northeast winds 5 to 10 mph. .THURSDAY NIGHT...Showers likely with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Lows in the lower 60s. East winds 5 to 10 mph with gusts up to 20 mph, increasing to 15 to 20 mph with gusts up to 30 mph after midnight. Chance of rain 90 percent. .FRIDAY...Becoming partly sunny in the afternoon. A slight chance of thunderstorms. Showers likely, mainly in the morning. Humid with highs in the mid 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Mostly cloudy. Highs in the upper 60s. .SATURDAY NIGHT...Mostly cloudy. Lows in the mid 50s. .SUNDAY...Mostly cloudy with a 40 percent chance of showers. Highs in the mid 60s. .SUNDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the lower 50s. Chance of rain 40 percent. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 60s. .MONDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s. .TUESDAY...Partly sunny. Highs in the lower 70s.