County Forecast for Watseka , IL
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010100-
Iroquois-
Including the cities of Watseka and Gilman
1251 PM CDT Mon Aug 31 2026

..heat advisory in effect from noon to 9 pm cdt tuesday   
..heat advisory in effect from noon to 9 pm cdt wednesday   
This afternoon   Partly cloudy. Highs in the upper 80s. Southwest winds 5 to 10 mph.
Tonight   Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph.
Tuesday   Partly cloudy in the morning, then becoming mostly sunny. Hot, humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 103.
Tuesday night   Clear, humid with lows in the mid 70s. Southwest winds around 5 mph.
Wednesday   Mostly sunny. Hot, humid with highs in the lower 90s. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 103.
Wednesday night   Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s.
Thursday   Partly cloudy in the morning, then clearing. A slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of precipitation 20 percent.
Thursday night   Partly cloudy with a slight chance of showers and thunderstorms. Lows around 70. Chance of precipitation 20 percent.
Friday   Partly cloudy. Highs around 90.
Friday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s.
Saturday   Partly cloudy. Highs in the upper 80s.
Saturday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.
Sunday   Mostly sunny. Highs in the mid 80s.
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Bryce Anderson – DTN Meteorologist
Summer Ending Hot for Much of the Country

Extreme temperatures for Southern Plains, southwestern Corn Belt. Showers, thunderstorms possible north. » More DTN Weather Commentary

Posted at 5:36AM Mon Aug 31, 2026 CDT
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