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Herrin, IL 7-Day Night Weather Forecast
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Herrin, IL Weather Forecast
Herrin, IL Weather Forecast Date: 1102 PM CDT Thu Oct 22 2026
The area/counties/county of: Williamson, including the city of Herrin.or toggle through each period.
Tonight... Clear. Lows in the mid 40s. Calm winds.
Friday... Sunny. Highs in the mid 70s. East winds around 5 mph.
Friday Night... Mostly clear. Lows in the mid 40s. East winds around 5 mph in the evening, becoming light and variable.
Saturday... Sunny. Highs in the mid 70s. East winds around 5 mph.
Saturday Night... Mostly clear. Lows in the mid 40s. East winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny. Highs in the upper 70s.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s.
Monday... Mostly cloudy. Highs in the mid 70s. Lows in the upper 40s.
Tuesday... Mostly cloudy. Highs in the mid 70s. Lows in the upper 40s.
Wednesday... Mostly sunny. Highs in the mid 70s.
Wednesday Night... Mostly clear. Lows in the upper 40s. Highs in the mid 70s.
POP = Probability of Precipitation
Herrin Radar Loop
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