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Blair, IL 7-Day Night Weather Forecast
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Blair, IL Weather Forecast
Blair, IL Weather Forecast Date: 1017 PM CDT Mon Sep 14 2026
The area/counties/county of: Randolph County Il, including the cities of: Chester and Sparta.or toggle through each period.
Overnight... Clear. Lows in the upper 60s. Southeast winds 5 to 10 mph.
Tuesday... Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 110.
Tuesday Night... Partly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Humid with lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 40%. Heat index values up to 104 early in the evening.
Wednesday... Sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20%. Heat index values up to 106.
Wednesday Night... Mostly clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 100 early in the evening.
Thursday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Friday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Saturday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Sunday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 20%.
Sunday Night... Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 60s. Chance of rain 30%.
POP = Probability of Precipitation
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