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City of Mt. Vernon, IllinoisMount Vernon, IL 7-Day Night Weather Forecast
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Mount Vernon, IL Weather Forecast
Mount Vernon, IL Weather Forecast Date: 1222 AM CST Sun Nov 08 2026
The area/counties/county of: Jefferson, including the city of Mount Vernon.or toggle through each period.
Overnight... Clear. Widespread frost with patchy fog. Near steady temperature in the lower 30s. Southwest winds around 5 mph.
Sunday... Widespread frost in the morning. Sunny. Highs in the mid 60s. Southwest winds 5 to 10 mph.
Sunday Night... Mostly clear. Patchy fog in the evening, then areas of fog after midnight. Lows in the upper 30s. West winds around 5 mph in the evening, becoming light and variable.
Monday... Patchy fog and frost in the morning. Sunny. Highs in the mid 60s. Calm winds, becoming southwest around 5 mph in the afternoon.
Monday Night... Clear. Lows in the lower 40s. Southwest winds around 5 mph.
Tuesday... Sunny. Highs in the upper 60s.
Tuesday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s.
Veterans Day... Partly sunny. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 40%.
Wednesday Night... Mostly cloudy. Lows in the upper 30s.
Thursday... Partly cloudy. Highs in the mid 50s. Lows in the lower 30s.
Thursday Night... Partly cloudy. Highs in the mid 50s. Lows in the lower 30s.
Friday... Mostly clear. Highs around 50. Lows around 30.
Friday Night... Mostly clear. Highs around 50. Lows around 30.
POP = Probability of Precipitation
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