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Nason, IL Weather Forecast
Nason, IL Weather Forecast Date: 852 PM CDT Sun Oct 11 2026
The area/counties/county of: Jefferson, including the city of Mount Vernon.or toggle through each period.
Tonight... Clear this evening, then becoming partly cloudy. Lows around 60. Southwest winds around 5 mph.
Columbus Day... Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph.
Monday Night... Clear. Lows in the mid 60s. Southwest winds 5 to 10 mph.
Tuesday... Sunny. Highs in the mid 90s. Southwest winds 10 to 15 mph.
Tuesday Night... Partly cloudy with a chance of showers after midnight. Lows in the upper 60s. Southwest winds 5 to 10 mph. Chance of rain 30%.
Wednesday... A chance of thunderstorms. Showers. Highs in the mid 80s. Chance of rain 90%.
Wednesday Night... Showers likely. Lows in the mid 60s. Chance of rain 70%.
Thursday... Showers likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 70%.
Thursday Night... Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 50s. Chance of rain 50%.
Friday... Mostly cloudy in the morning, then becoming mostly sunny. Breezy with highs in the upper 60s.
Friday Night... Mostly clear. Lows in the upper 30s. Highs around 60.
Saturday... Mostly clear. Lows in the upper 30s. Highs around 60.
Saturday Night... Clear. Lows in the mid 30s. Highs in the upper 60s.
POP = Probability of Precipitation
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