| NWS Forecast for: Mellette County Issued by: National Weather Service Rapid City, SD Last Update: 1122 PM CDT Wed Aug 26 2026 |  |
| Overnight: Mostly clear with a slight chance of showers and thunderstorms. Lows in the upper 50s. Southeast winds 5 to 10 mph. Chance of rain 20 percent. Thursday: Partly cloudy with a slight chance of showers and thunderstorms. Highs in the upper 80s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Thursday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the lower 60s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Friday: Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 90s. South winds 10 to 20 mph with gusts up to 30 mph. Chance of rain 20 percent. Friday Night: Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 40 percent. Saturday: Partly cloudy. Highs in the mid 90s. Saturday Night: Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Chance of rain 30 percent. Sunday: Partly cloudy. Highs around 90. Sunday Night: Partly cloudy. Lows in the mid 60s. Monday: Partly cloudy. Highs in the mid 80s. Monday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent. Tuesday: Partly cloudy. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. Tuesday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of rain 20 percent. Wednesday: Partly cloudy in the morning, then clearing. Highs around 90. | |
| Zone Forecast: Mellette County | |
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