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Mermet Lake State Conservation Area, IL 7-Day Night Weather Forecast
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Mermet Lake State Conservation Area, IL Weather Forecast
Mermet Lake State Conservation Area, IL Weather Forecast Date: 127 PM CDT Sat Aug 15 2026
The area/counties/county of: Massac, including the city of Metropolis.or toggle through each period.
This Afternoon... Sunny, hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Highest heat index readings heat index readings up to 108.
Tonight... Mostly clear. Lows in the mid 70s. South winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Highest heat index readings heat index readings up to 108 in the afternoon.
Sunday Night... A chance of showers in the evening. Partly cloudy. Lows in the lower 70s. West winds around 5 mph, becoming north after midnight. Chance of rain 30%.
Monday... Mostly sunny with a chance of showers. Highs in the upper 80s. North winds around 5 mph. Chance of rain 40%.
Monday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s.
Tuesday... Mostly clear. Highs around 90. Lows around 70.
Tuesday Night... Mostly clear. Highs around 90. Lows around 70.
Wednesday... Mostly sunny. Highs in the mid 90s.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50%.
Thursday... Partly sunny. Highs in the mid 80s.
Thursday Night... Partly cloudy. Lows in the mid 60s. Highs in the mid 80s.
POP = Probability of Precipitation
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