SIOUX FALLS SiouxFallsWeather.com

Thursday, September 17, 2026

Zone Forecast Product

.TONIGHT...Showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible 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 near 100 percent. .FRIDAY...Mostly cloudy. Showers with a chance of thunderstorms in the morning, then a slight chance of showers in the afternoon. Humid with highs in the mid 70s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 90 percent. .FRIDAY NIGHT...Mostly cloudy. Humid with lows around 60. Northeast winds 5 to 10 mph. .SATURDAY...Mostly cloudy. A chance of showers in the afternoon. Highs in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly cloudy. Lows in the mid 50s. Northeast winds around 10 mph. .SUNDAY...Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 60s. Chance of rain 40 percent. .SUNDAY NIGHT...Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 50s. Chance of rain 70 percent. .MONDAY...A chance of showers in the morning. Mostly cloudy. Highs around 60. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy. Lows around 50. .TUESDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 60s. .TUESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. .WEDNESDAY...Mostly cloudy in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 30 percent. .WEDNESDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of rain 40 percent. .THURSDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs around 70. -- This email has been checked for viruses by AVG antivirus software. www.avg.com