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City of Sullivan, IllinoisSullivan, IL 7-Day Night Weather Forecast
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Sullivan, IL Weather Forecast
Sullivan, IL Weather Forecast Date: 932 AM CDT Mon Sep 14 2026
The area/counties/county of: Moultrie, including the city of Sullivan.or toggle through each period.
Rest of Today... Mostly sunny. Highs in the lower 80s. Southeast winds 10 to 15 mph.
Tonight... Mostly clear. Not as cool with lows in the upper 60s. Southeast winds around 10 mph with gusts up to 20 mph.
Tuesday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Warmer. More humid with highs in the mid 90s. Southwest winds 10 to 15 mph. Chance of rain 40%. Heat index values up to 102 in the afternoon.
Tuesday Night... Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely after midnight. Humid with lows in the upper 60s. Southwest winds around 5 mph, becoming east after midnight. Chance of rain 60%.
Wednesday... A chance of showers in the morning. Mostly sunny. Humid with highs in the lower 90s. East winds around 5 mph, becoming south in the afternoon. Chance of rain 50%. Heat index values up to 100 in the afternoon.
Wednesday Night... Partly cloudy. Lows around 70. Highs around 90.
Thursday... Partly cloudy. Lows around 70. Highs around 90.
Friday... Partly cloudy. Lows around 70. Highs around 90.
Saturday... Partly cloudy. Lows around 70. Highs around 90.
Saturday Night... Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 30%.
POP = Probability of Precipitation
Sullivan Radar Loop
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