County Forecast for Watseka , IL
Change Zip Code: 
 
291200-
Iroquois-
Including the cities of Watseka and Gilman
143 PM CDT Sun Jun 28 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON CDT /1 PM EDT/
MONDAY TO 10 PM CDT /11 PM EDT/ WEDNESDAY...

Late this afternoon   Mostly cloudy. A slight chance of showers and thunderstorms. Temperatures in the mid 80s. Southeast winds around 10 mph. Chance of precipitation 20 percent.
Tonight   Partly cloudy. A slight chance of showers and thunderstorms early in the evening. Humid. Lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of precipitation 20 percent.
Monday   Partly cloudy. Humid with highs in the lower 90s. South winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 106.
Monday night   Partly cloudy in the evening, then becoming mostly clear. Humid with lows in the mid 70s. South winds 10 to 15 mph, becoming southwest 5 to 10 mph after midnight. 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 104.
Tuesday night   Clear with lows in the mid 70s. Southwest winds 10 to 15 mph, diminishing to 5 to 10 mph after midnight. Heat index values up to 103 early in the evening.
Wednesday   Sunny, hot with highs in the mid 90s.
Wednesday night   Clear. Lows in the mid 70s.
Thursday   Mostly sunny. Hot with highs in the mid 90s.
Thursday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s.
Friday   Mostly sunny in the morning, then becoming partly cloudy. A chance of showers and thunderstorms. Hot with highs in the lower 90s. Chance of precipitation 50 percent.
Friday night   Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of precipitation 40 percent.
Independence day   Partly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of precipitation 40 percent.
Saturday night   Partly cloudy. Lows around 70.
Sunday   Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of precipitation 40 percent.
DTN Weather
Local Weather
Radar
County Forecast
State Forecast
DTN Weather Commentary
US Satellite
Current Surface Analysis
Wind Conditions
Today's Forecast Highs
Tonight's Forecast Lows
24 Hr Surface Forecast
Jet Stream Forecast
24 Hr Rainfall Estimate
24 Hr StormPath Accum
48 Hr StormPath Accum
6-10 Day Temp Forecast
6-10 Day Precip Forecast
Thunderstorm Outlook
US Drought Monitor
US Palmer Drought Index
US Crop Moisture Index
US Growing Degree Days
Soil Temperatures
Hurricane Tracking

DTN Weather Summary

Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heatwave Starts This Weekend, Continues Through Next Week
Posted at 12:03PM Fri Jun 26, 2026 CDT
Click here to get your local weather emailed to you each day.
Copyright DTN. All rights reserved. Disclaimer.
The First Trust and Savings Bank is not responsible for and has no control over the subject matter, content, information, or graphics of this website or the websites that have links here. Please contact us with any concerns or comments.
Powered By DTN