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Bonnie, IL Weather Forecast
Bonnie, IL Weather Forecast Date: 822 AM CDT Sun Oct 18 2026
The area/counties/county of: Jefferson, including the city of Mount Vernon.or toggle through each period.
Today... Widespread frost this morning. Sunny. Highs in the upper 60s. Southeast winds around 5 mph.
Tonight... Clear. Lows in the upper 30s. Southeast winds around 5 mph in the evening, becoming light and variable.
Monday... Sunny. Highs in the lower 70s. Calm winds.
Monday Night... Mostly clear. Lows around 40. Calm winds.
Tuesday... Sunny. Highs in the mid 70s. Calm winds, becoming northeast around 5 mph in the afternoon.
Tuesday Night... Mostly clear. Lows in the lower 40s.
Wednesday... Clear. Highs in the mid 70s. Lows in the mid 40s.
Wednesday Night... Clear. Highs in the mid 70s. Lows in the mid 40s.
Thursday... Sunny. Highs in the upper 70s.
Thursday Night... Clear. Lows in the mid 40s. Highs in the upper 70s.
Friday... Clear. Lows in the mid 40s. Highs in the upper 70s.
Friday Night... Mostly clear. Lows in the mid 40s. Highs in the upper 70s.
POP = Probability of Precipitation
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