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Jefferson County, MO Weather Forecast
Jefferson County, MO Weather Forecast Date: 228 PM CDT Wed Sep 23 2026
The area/counties/county of: Monroe County Il, Jefferson County Mo.or toggle through each period.
This Afternoon... Partly sunny. Near steady temperature in the upper 60s. North winds 5 to 10 mph.
Tonight... Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.
Thursday... Partly sunny. Highs in the mid 70s. Northeast winds around 5 mph.
Thursday Night... Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph in the evening, becoming light and variable.
Friday... Partly sunny. Highs in the upper 70s. East winds around 5 mph.
Friday Night... Mostly cloudy. Lows in the mid 50s.
Saturday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 30%.
Saturday Night... Mostly cloudy. A 20% chance of showers. Lows in the mid 50s. Highs in the upper 70s.
Sunday... Mostly cloudy. A 20% chance of showers. Lows in the mid 50s. Highs in the upper 70s.
Sunday Night... Partly cloudy. Lows in the upper 50s. Highs in the lower 80s.
Monday... Partly cloudy. Lows in the upper 50s. Highs in the lower 80s.
POP = Probability of Precipitation
Jefferson County Radar Loop
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