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Grigg, IL 7-Day Night Weather Forecast
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Grigg, IL Weather Forecast
Grigg, IL Weather Forecast Date: 332 AM CDT Fri Sep 04 2026
The area/counties/county of: Randolph County Il, including the cities of: Chester and Sparta.or toggle through each period.
Today... Sunny. Isolated showers and thunderstorms this afternoon. Hot with highs in the upper 90s. Southwest winds around 5 mph. Chance of rain 20%. Heat index values up to 107.
Tonight... Mostly clear. Lows in the lower 70s. Southwest winds around 5 mph. Heat index values up to 105 early in the evening.
Saturday... Mostly sunny. Hot with highs in the upper 90s. Northwest winds around 5 mph. Heat index values up to 106.
Saturday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 70s. North winds around 5 mph. Heat index values up to 102 early in the evening.
Sunday... Sunny with highs in the lower 90s. Northeast winds 5 to 10 mph. Heat index values up to 104.
Sunday Night... Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100.
Monday... Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100.
Tuesday... Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100.
Tuesday Night... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105.
Wednesday... Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105.
POP = Probability of Precipitation
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