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Waltonville Lake, IL 7-Day Night Weather Forecast
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Waltonville Lake, IL Weather Forecast
Waltonville Lake, IL Weather Forecast Date: 607 AM CDT Sun Aug 09 2026
The area/counties/county of: Jefferson, including the city of Mount Vernon.or toggle through each period.
Today... Patchy fog this morning. Sunny. Highs in the lower 90s. South winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph.
Monday... Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Highest heat index readings heat index readings up to 105 in the afternoon.
Monday Night... Mostly clear. Lows in the upper 70s. Southwest winds 5 to 10 mph.
Tuesday... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph.
Tuesday Night... Partly cloudy. Hot. Lows in the upper 70s. Highs in the mid 90s.
Wednesday... Partly cloudy. Hot. Lows in the upper 70s. Highs in the mid 90s.
Wednesday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50%.
Thursday... Partly sunny in the morning, then becoming mostly cloudy. A chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50%.
Thursday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 60%.
Friday... Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs in the mid 80s. Chance of rain 50%.
Friday Night... Mostly cloudy with a 40% chance of showers. Lows in the upper 60s.
POP = Probability of Precipitation
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