County Forecast for Watseka , IL
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182200-
Iroquois-
Including the cities of Watseka and Gilman
920 AM CDT Fri Sep 18 2026

Rest of today   Mostly cloudy. Isolated showers in the late morning and early afternoon. Highs in the upper 70s. East winds 5 to 10 mph. Chance of precipitation 20 percent.
Tonight   Mostly clear in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms after midnight. A chance of showers and thunderstorms late. Lows in the lower 60s. East winds 5 to 10 mph. Chance of precipitation 50 percent.
Saturday   Thunderstorms likely in the morning. Showers. A slight chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. South winds 5 to 10 mph. Chance of precipitation 90 percent.
Saturday night   Showers likely with a chance of thunderstorms. Humid with lows in the mid 60s. Southeast winds around 5 mph, becoming east after midnight. Chance of precipitation 70 percent.
Sunday   Showers likely with a slight chance of thunderstorms. Humid with highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of precipitation 70 percent.
Sunday night   Showers likely with a chance of thunderstorms. Lows in the mid 50s. Chance of precipitation 60 percent.
Monday   Showers likely with a slight chance of thunderstorms. Highs in the upper 60s. Chance of precipitation 70 percent.
Monday night   Mostly cloudy with a chance of showers. A slight chance of thunderstorms after midnight. Lows in the lower 50s. Chance of precipitation 40 percent.
Tuesday   Mostly cloudy. Highs in the mid 60s.
Tuesday night   Mostly cloudy. Lows around 50.
Wednesday   Partly cloudy in the morning, then becoming mostly cloudy. Highs in the upper 60s.
Wednesday night   Mostly cloudy. Lows around 50.
Thursday   Mostly cloudy. Highs around 70.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heavy Rain for Upper Midwest Friday
Posted at 5:31AM Fri Sep 18, 2026 CDT
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