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Union School, SD Weather Forecast
Union School, SD Weather Forecast Date: 922 PM MDT Sat Sep 19 2026
The area/counties/county of: Southern Perkins, including the cities of: Usta, Bison, Sorum, and Zeona.or toggle through each period.
Rest of Tonight... Cloudy with showers likely. Patchy fog. Lows in the lower 50s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70%.
Sunday... Patchy fog in the morning. Showers. Thunderstorms likely in the afternoon. Highs in the upper 50s. East winds 10 to 20 mph with gusts up to 30 mph.
Sunday Night... Showers with thunderstorms likely in the evening, then showers likely after midnight. Lows in the upper 40s. East winds 10 to 15 mph. Gusts up to 25 mph in the evening.
Monday... Cloudy in the morning, then becoming partly cloudy. A 20% chance of showers. Highs in the mid 60s. East winds 10 to 15 mph with gusts up to 25 mph.
Monday Night... Partly cloudy. Lows in the mid 40s. Southeast winds 10 to 20 mph.
Tuesday... Partly cloudy and windy. Highs in the upper 60s.
Tuesday Night... Partly cloudy and breezy. Lows around 50.
Wednesday... Partly cloudy. A chance of showers with a slight chance of thunderstorms in the afternoon. Breezy with highs in the upper 70s. Chance of rain 30%.
Wednesday Night... Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 50s. Chance of rain 50%.
Thursday... Partly cloudy in the morning, then clearing. Highs in the lower 80s.
Thursday Night... Mostly clear. Lows in the lower 50s.
Friday... Partly cloudy in the morning, then clearing. Breezy with highs around 80.
Friday Night... Partly cloudy. A slight chance of showers after midnight. Breezy with lows in the mid 50s. Chance of rain 20%.
POP = Probability of Precipitation
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