County Forecast for Watseka , IL
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182330-
Iroquois-
Including the cities of Watseka and Gilman
333 AM CDT Sat Jul 18 2026

Today   Mostly sunny in the morning, then becoming mostly cloudy. A chance of showers and thunderstorms early in the afternoon. Showers and thunderstorms likely late. Highs in the lower 90s. West winds 10 to 15 mph. Chance of precipitation 70 percent. Heat index values up to 103.
Tonight   Partly cloudy in the evening, then clearing. A chance of showers and thunderstorms early in the evening. Patchy smoke after midnight. Humid with lows in the mid 60s. North winds around 5 mph. Chance of precipitation 50 percent.
Sunday   Mostly sunny. Patchy smoke. Highs in the lower 80s. Northeast winds around 5 mph.
Sunday night   Mostly clear. Lows in the lower 60s. East winds around 5 mph in the evening, becoming light and variable.
Monday   Partly cloudy. Humid with highs in the mid 80s. South winds around 5 mph.
Monday night   Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the lower 70s. Chance of precipitation 70 percent.
Tuesday   Partly cloudy in the morning, then becoming mostly sunny. A slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of precipitation 20 percent.
Tuesday night   Clear. Lows in the lower 60s.
Wednesday   Mostly sunny. Highs in the upper 70s.
Wednesday night   Mostly clear. Lows in the mid 50s.
Thursday   Mostly sunny. Highs around 80.
Thursday night   Mostly clear in the evening, then becoming partly cloudy. Lows around 60.
Friday   Partly cloudy. Highs in the lower 80s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heat Wave Continues for Western Corn Belt This Weekend, Then Ends
Posted at 12:00PM Fri Jul 17, 2026 CDT
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