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Little Grassy Lake, IL 7-Day Night Weather Forecast
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Little Grassy Lake, IL Weather Forecast
Little Grassy Lake, IL Weather Forecast Date: 332 AM CDT Fri Aug 14 2026
The area/counties/county of: Williamson, including the city of Herrin.or toggle through each period.
Today... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Highest heat index readings heat index readings up to 105 this afternoon.
Tonight... Mostly clear. Lows in the mid 70s. South winds around 5 mph.
Saturday... Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Highest heat index readings heat index readings up to 105 in the afternoon.
Saturday Night... Mostly clear. Lows in the upper 70s. Southwest winds around 5 mph.
Sunday... Sunny, hot with highs around 100. West winds 5 to 10 mph. Highest heat index readings heat index readings up to 106 in the afternoon.
Sunday Night... Partly cloudy. Lows in the mid 70s. Highs in the lower 90s.
Monday... Partly cloudy. Lows in the mid 70s. Highs in the lower 90s.
Monday Night... Partly cloudy. 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. Hot with highs in the mid 90s.
Wednesday Night... Partly cloudy. A chance of showers after midnight. Lows in the lower 70s. Chance of rain 30%.
POP = Probability of Precipitation
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