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Union Lake, MO Weather Forecast
Union Lake, MO Weather Forecast Date: 1033 PM CDT Fri Oct 02 2026
The area/counties/county of: Gasconade County Mo, including the cities of: Washington, Union, and Sullivan.or toggle through each period.
Overnight... Clear. Lows in the lower 50s. Northeast winds around 5 mph.
Saturday... Sunny. Highs in the lower 70s. East winds around 5 mph.
Saturday Night... Partly cloudy. Lows around 50. East winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny. Highs in the upper 70s. North winds around 5 mph.
Sunday Night... Clear. Lows in the lower 50s. North winds around 5 mph.
Monday... Sunny. Highs in the lower 70s.
Monday Night... Clear. Lows in the mid 40s. Highs in the mid 70s.
Tuesday... Clear. Lows in the mid 40s. Highs in the mid 70s.
Tuesday Night... Mostly clear. Lows in the upper 40s. Highs in the lower 80s.
Wednesday... Mostly clear. Lows in the upper 40s. Highs in the lower 80s.
Wednesday Night... Clear. Lows in the mid 50s. Highs in the mid 80s.
Thursday... Clear. Lows in the mid 50s. Highs in the mid 80s.
POP = Probability of Precipitation
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