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Union County, SD 7-Day Night Weather Forecast
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Union County, SD Weather Forecast
Union County, SD Weather Forecast Date: 639 AM CDT Wed Sep 30 2026
The area/counties/county of: Union, including the cities of: North Sioux City, Beresford, Elk Point, Alcester, and Jefferson.or toggle through each period.
Today... Widespread dense fog this morning. Cloudy. Highs in the lower 70s. North winds around 5 mph this morning, becoming light and variable.
Tonight... Cloudy. A chance of sprinkles in the evening, then a chance of showers after midnight. Lows in the upper 50s. Light and variable winds, becoming north 5 to 10 mph after midnight. Chance of rain 30%.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 60s. North winds 10 to 15 mph.
Thursday Night... Partly cloudy. Cooler with lows in the upper 40s. North winds 5 to 10 mph.
Friday... Sunny. Highs in the lower 60s. Northeast winds around 5 mph, becoming east in the afternoon.
Friday Night... Mostly clear. Lows around 50.
Saturday... Mostly sunny. Highs in the mid 60s.
Saturday Night... Partly cloudy in the evening, then clearing. Lows in the upper 40s.
Sunday... Sunny. Highs in the lower 60s.
Sunday Night... Mostly clear. Lows in the mid 40s.
Monday... Mostly sunny. Highs in the lower 60s.
Monday Night... Partly cloudy. Lows in the lower 50s.
POP = Probability of Precipitation
Union County Radar Loop
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