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Union County State Park, SD 7-Day Weather Forecast
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Union County State Park Weather Forecast
Union County State Park, SD Weather Forecast Date: 755 PM CDT Tue Aug 18 2026
Weather forecast for Union County State Park, SD
Tonight Lo: 61°F Lo: 16°C |
Tonight... Mostly cloudy. Lows in the lower 60s. North winds around 5 mph, becoming east around 5 mph after midnight. |
Wed Hi: 79°FHi: 26°C Lo: 60°F Lo: 16°C |
Wednesday... Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs in the upper 70s. Southeast winds around 5 mph, becoming southwest around 5 mph in the afternoon. Chance of rain 50%. |
Thu Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Thursday... Sunny. A slight chance of showers in the afternoon. Humid with highs in the lower 80s. South winds 5 to 10 mph. Chance of rain 20%. |
Fri Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Friday... Sunny. Highs in the lower 80s. |
| Sat Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Saturday... Sunny. Highs in the upper 70s. |
Sun Hi: 75°FHi: 24°C Lo: 61°F Lo: 16°C |
Sunday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s. |
| Mon Hi: 80°FHi: 27°C Lo: 61°F Lo: 16°C |
Monday... Mostly sunny. Highs around 80. |
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