County Forecast for Watseka , IL
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301015-
Iroquois-
Including the cities of Watseka and Gilman
209 PM CDT Mon Jun 29 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT /11 PM EDT/
WEDNESDAY...

Late this afternoon   Mostly cloudy. Temperatures around 90. South winds 10 to 15 mph. Heat index values up to 105.
Tonight   Mostly cloudy in the evening then clearing. Humid. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 102 early in the evening.
Tuesday   Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 108.
Tuesday night   Clear with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 104 early in the evening.
Wednesday   Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107.
Wednesday night   Clear with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 105 early in the evening.
Thursday   Sunny in the morning, then becoming partly cloudy. A slight chance of showers and thunderstorms. Hot with highs in the lower 90s. Chance of precipitation 20 percent.
Thursday night   Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of precipitation 50 percent.
Friday   Partly cloudy with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of precipitation 50 percent.
Friday night   Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of precipitation 50 percent.
Independence day   Partly cloudy with a chance of showers and thunderstorms. Highs around 90. Chance of precipitation 40 percent.
Saturday night   Partly cloudy. A chance of showers and thunderstorms after midnight. Lows around 70. Chance of precipitation 40 percent.
Sunday   Mostly cloudy in the morning, then becoming partly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of precipitation 50 percent.
Sunday night   Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of precipitation 50 percent.
Monday   Partly cloudy. A chance of showers in the afternoon. Highs in the mid 80s. Chance of precipitation 40 percent.
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DTN Weather Summary

Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heat, Risk of Storms Continues Tuesday
Posted at 12:09PM Mon Jun 29, 2026 CDT
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