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Union County, SD 7-Day Weather Forecast
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Union County Weather Forecast
Union County, SD Weather Forecast Date: 1029 PM CDT Tue Oct 13 2026
Weather forecast for Union County, SD
Tonight Lo: 45°F Lo: 7°C |
Tonight... Partly cloudy. Lows in the mid 40s. North winds 5 to 10 mph. |
Wed Hi: 61°FHi: 16°C Lo: 45°F Lo: 7°C |
Wednesday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 60s. Northeast winds 5 to 10 mph. |
Thu Hi: 59°FHi: 15°C Lo: 40°F Lo: 4°C |
Thursday... Showers. Highs in the upper 50s. North winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100%. |
Fri Hi: 55°FHi: 13°C Lo: 35°F Lo: 2°C |
Friday... Sunny. Highs in the mid 50s. |
| Sat Hi: 61°FHi: 16°C Lo: 45°F Lo: 7°C |
Saturday... Widespread frost in the morning. Sunny. Highs in the lower 60s. |
| Sun Hi: 65°FHi: 18°C Lo: 45°F Lo: 7°C |
Sunday... Mostly sunny. Highs in the mid 60s. |
| Mon Hi: 69°FHi: 21°C Lo: 49°F Lo: 9°C |
Monday... Sunny. Highs in the upper 60s. |
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