County Forecast for Watseka , IL
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220915-
Iroquois-
Including the cities of Watseka and Gilman
159 PM CDT Thu May 21 2026

Late this afternoon   Partly cloudy. Temperatures in the upper 60s. East winds 10 to 15 mph.
Tonight   Mostly cloudy. Lows in the lower 50s. East winds 10 to 15 mph.
Friday   Mostly cloudy. A chance of showers late. Highs in the lower 70s. East winds 10 to 15 mph. Chance of precipitation 30 percent.
Friday night   Cloudy. A chance of showers. Lows in the mid 50s. East winds 10 to 15 mph, becoming northeast 5 to 10 mph after midnight. Chance of precipitation 40 percent.
Saturday   Mostly cloudy. A slight chance of showers in the morning. Highs in the mid 70s. North winds around 5 mph. Chance of precipitation 20 percent.
Saturday night   Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. North winds around 5 mph, becoming east after midnight. Chance of precipitation 20 percent.
Sunday   Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of precipitation 50 percent.
Sunday night   Mostly cloudy. A slight chance of showers in the evening. Lows in the mid 50s. Chance of precipitation 20 percent.
Memorial day   Mostly cloudy. Highs in the lower 80s.
Monday night   Mostly cloudy. Lows in the upper 50s.
Tuesday   Mostly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 30 percent.
Tuesday night   Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of precipitation 40 percent.
Wednesday   Mostly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 50 percent.
Wednesday night   Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 60s. Chance of precipitation 50 percent.
Thursday   Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of precipitation 30 percent.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Southern Front, Plains Storm Still Active Friday

Stalled front and combining Plains systems will bring widespread showers and thunderstorms through Friday. » More DTN Weather Commentary

Posted at 12:18PM Thu May 21, 2026 CDT
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