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City of Harrisburg, ILHarrisburg, IL 7-Day Night Weather Forecast
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Harrisburg, IL Weather Forecast
Harrisburg, IL Weather Forecast Date: 217 PM CDT Mon Sep 14 2026
The area/counties/county of: Saline, including the city of Harrisburg.or toggle through each period.
This Afternoon... Sunny. Near steady temperature in the mid 80s. East winds 5 to 10 mph.
Tonight... Clear. Lows in the upper 60s. Southeast winds around 5 mph.
Tuesday... Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph.
Tuesday Night... Mostly clear. Lows in the lower 70s. South winds around 5 mph in the evening, becoming light and variable.
Wednesday... Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph.
Wednesday Night... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
Thursday... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
Friday... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
Saturday... Mostly clear. Hot. Lows in the lower 70s. Highs in the upper 90s.
POP = Probability of Precipitation
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