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| NWS Forecast for: Sioux County Issued by: National Weather Service Sioux Falls, SD Last Update: 238 AM CDT Tue Jun 9 2026 | |
Today: Mostly sunny. Highs in the mid 90s. Southeast winds 15 to 20 mph. Heat index values up to 101. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Humid with lows in the lower 70s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent. Heat index values up to 100 early in the evening. Wednesday: Sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. South winds 15 to 20 mph, becoming west in the afternoon. Chance of rain 20 percent. Wednesday Night: Mostly clear in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Cooler. Less humid with lows around 60. Northwest winds 15 to 20 mph, becoming northeast around 5 mph after midnight. Chance of rain 50 percent. Thursday: Partly sunny with a chance of showers with a slight chance of thunderstorms in the morning, then sunny in the afternoon. Breezy and not as warm with highs in the upper 70s. North winds 10 to 15 mph, becoming northwest 15 to 25 mph in the afternoon. Chance of rain 50 percent. Thursday Night: Mostly clear. Lows in the mid 50s. Friday: Sunny. Highs in the mid 80s. Friday Night: Mostly clear. Lows in the upper 50s. Saturday: Mostly sunny. Highs in the lower 80s. Saturday Night: Partly cloudy. Lows in the mid 50s. Sunday: Partly sunny. Highs in the mid 70s. Sunday Night: Partly cloudy. Lows in the lower 50s. Monday: Mostly sunny. Highs in the mid 70s. | |
| Zone Forecast: Sioux County | |
Visit your local NWS office at: https://www.weather.gov/fsd/ |