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Rend Lake State Wildlife Refuge, IL Weather Forecast
Rend Lake State Wildlife Refuge, IL Weather Forecast Date: 202 AM CDT Tue Aug 25 2026
The area/counties/county of: Jefferson, including the city of Mount Vernon.or toggle through each period.
Overnight... Mostly clear. Near steady temperature in the lower 60s. East winds around 5 mph.
Tuesday... Sunny. Highs in the mid 80s. East winds around 5 mph.
Tuesday Night... Partly cloudy. Lows in the mid 60s. East winds around 5 mph in the evening, becoming light and variable.
Wednesday... Mostly sunny. Highs in the lower 90s. Calm winds, becoming southwest around 5 mph in the afternoon.
Wednesday Night... Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 60s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 40%.
Thursday... Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Friday... Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Saturday... Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Sunday... Mostly clear. Highs in the mid 90s. Lows in the lower 70s.
Sunday Night... Mostly clear. Highs in the mid 90s. Lows in the lower 70s.
POP = Probability of Precipitation
Rend Lake State Wildlife Refuge Radar Loop
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