SIOUX FALLS SiouxFallsWeather.com

Saturday, August 15, 2026

Zone Forecast Product

.REST OF TONIGHT...Cloudy. Patchy fog. Near steady temperature around 70. South winds around 5 mph. .SATURDAY...Mostly cloudy. Areas of fog in the morning. A chance of showers and thunderstorms in the afternoon. Humid with highs around 80. Southwest winds around 5 mph, becoming west in the afternoon. Chance of rain 50 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Humid with lows in the lower 60s. Northwest winds 5 to 10 mph. Chance of rain 20 percent. .SUNDAY...Sunny. Highs in the upper 70s. North winds 5 to 10 mph. .SUNDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. North winds 5 to 10 mph in the evening, becoming light and variable. .MONDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 20 percent. .MONDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers. Lows in the lower 60s. Chance of rain 50 percent. .TUESDAY...A chance of thunderstorms. Showers. Highs in the upper 70s. Chance of rain 80 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 50s. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy in the morning, then becoming mostly sunny. Highs in the lower 70s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 50s. .THURSDAY...Mostly sunny. Highs in the mid 70s. .THURSDAY NIGHT...A chance of showers in the evening. Partly cloudy. Lows in the upper 50s. Chance of rain 30 percent. .FRIDAY...Partly sunny in the morning, then clearing. Highs in the upper 70s.