| NWS Forecast for: Sioux County Issued by: National Weather Service Sioux Falls, SD Last Update: 919 PM CDT Thu Sep 3 2026 | |
Tonight: Mostly clear. Lows in the lower 70s. South winds 10 to 15 mph. Heat index values in the upper 90s early this evening. Friday: Sunny with highs in the lower 90s. South winds around 5 mph, becoming east around 5 mph in the afternoon. Heat index values up to 100 in the afternoon. Friday Night: Mostly clear. Humid with lows around 70. East winds around 5 mph. Heat index values in the upper 90s early in the evening. Saturday: Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Humid with highs in the lower 90s. Southeast winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 101. Saturday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 20 percent. Heat index values in the upper 90s early in the evening. Sunday: Mostly sunny. A chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 50 percent. Sunday Night: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50 percent. Labor Day: Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny in the afternoon. Highs in the upper 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 in the lower 70s. Chance of rain 50 percent. Tuesday: Mostly cloudy in the morning, then becoming mostly sunny. A chance of showers. Highs in the upper 80s. Chance of rain 50 percent. Tuesday Night: Partly cloudy. A chance of showers in the evening. Lows in the mid 60s. Chance of rain 40 percent. Wednesday: Partly sunny in the morning, then clearing. Highs in the mid 80s. Wednesday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Thursday: Mostly sunny. Highs in the lower 80s. | |
| Zone Forecast: Sioux County | |
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