SIOUX FALLS SiouxFallsWeather.com

Sunday, May 17, 2026

Zone Forecast Product

.TODAY...Showers with a chance of thunderstorms this afternoon. Some thunderstorms may be severe. Breezy with highs in the lower 80s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent. .TONIGHT...Showers with a chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Some thunderstorms may be severe in the evening. Lows in the mid 40s. Northwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent. .MONDAY...Cloudy. Showers likely with a slight chance of thunderstorms in the afternoon. Much cooler with highs in the upper 50s. North winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Showers likely, mainly in the evening. Breezy with lows around 40. North winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent. .TUESDAY...Mostly cloudy in the morning, then becoming partly sunny. Breezy with highs in the mid 50s. Northwest winds 15 to 25 mph with gusts up to 35 mph. .TUESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the mid 30s. .WEDNESDAY...Sunny, warmer with highs in the mid 60s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 40s. .THURSDAY...Partly sunny and breezy. Highs in the upper 60s. .THURSDAY NIGHT...Mostly cloudy. Lows in the mid 40s. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Mostly cloudy with a chance of showers. A chance of thunderstorms after midnight. Lows in the lower 50s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40 percent.