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Jefferson County, MO Weather Forecast
Jefferson County, MO Weather Forecast Date: 157 AM CDT Fri Sep 25 2026
The area/counties/county of: Monroe County Il, Jefferson County Mo.or toggle through each period.
Rest of Tonight... Mostly cloudy. Near steady temperature in the upper 50s. Light and variable winds.
Friday... Mostly cloudy. Highs in the upper 70s. Northeast winds around 5 mph.
Friday Night... Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.
Saturday... Mostly cloudy in the morning, then partly sunny with a slight chance of showers in the afternoon. Highs in the lower 70s. East winds around 5 mph. Chance of rain 20%.
Saturday Night... Mostly cloudy. Lows in the upper 50s. East winds around 5 mph in the evening, becoming light and variable.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 70s.
Sunday Night... Partly cloudy. Lows in the upper 50s. Highs in the upper 70s.
Monday... Partly cloudy. Lows in the upper 50s. Highs in the upper 70s.
Tuesday... Partly sunny. A chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 30%.
Tuesday Night... Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Chance of rain 50%.
Wednesday... Showers likely, mainly in the morning. Highs in the upper 70s. Chance of rain 60%.
Wednesday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 60s.
POP = Probability of Precipitation
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