County Forecast for Watseka , IL
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050200-
Iroquois-
Including the cities of Watseka and Gilman
120 PM CDT Fri Sep 4 2026

..heat advisory in effect until 10 pm cdt this evening   
This afternoon   Mostly sunny. Hot. Highs in the mid 90s. West winds 5 to 10 mph. Heat index values up to 104.
Tonight   Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of precipitation 20 percent.
Saturday   Mostly sunny. Humid with highs in the lower 90s. Temperature falling into the mid 80s in the afternoon. Northwest winds 5 to 10 mph. Heat index values up to 101.
Saturday night   Partly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Sunday   Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph.
Sunday night   Mostly clear. Lows in the upper 50s.
Labor day   Sunny in the morning, then becoming partly cloudy. Highs in the mid 80s.
Monday night   Partly cloudy. Lows in the lower 60s.
Tuesday   Partly cloudy. Highs in the upper 80s.
Tuesday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s.
Wednesday   Partly cloudy. Hot with highs in the lower 90s.
Wednesday night   Partly cloudy. A chance of showers after midnight. Lows in the upper 60s. Chance of precipitation 30 percent.
Thursday   Partly cloudy. Highs in the mid 80s.
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Bryce Anderson – DTN Meteorologist
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Hot and Dry for Central US Labor Day Weekend

Hot, humid conditions persist through the holiday weekend with scattered showers and thunderstorms likely. » More DTN Weather Commentary
Posted at 11:59AM Fri Sep 4, 2026 CDT
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