Chicago, Illinois — Spring-like warmth across Illinois will persist through Tuesday before storms and a cold front bring cooler temperatures midweek.
According to the National Weather Service Chicago office, much of the region will see a steady warming trend through early next week. Afternoon highs are expected to climb into the low to mid-60s Sunday, followed by upper 60s to low 70s Monday.
The warmest day in the outlook appears to be Tuesday, when temperatures may reach 65–78°F across parts of Illinois, with cooler readings near Lake Michigan. Forecasters say showers and thunderstorms are expected to develop mainly Tuesday evening as a cold front approaches the region.
Behind that front, temperatures are projected to fall sharply.
By Wednesday, highs are expected to drop into the 44–55°F range, with temperatures continuing to fall during the afternoon in some areas as cooler air moves in. Cloudy skies and rain are possible as the colder pattern settles across northern Illinois and northwest Indiana.
The cooler stretch is expected to continue into Thursday, when highs may only reach 42–48°F, marking a noticeable change from the early-week warmth.
Overnight lows through the period are forecast to range from the mid-30s tonight to the 40s and low 50s early next week, before falling again behind the cold front.
Forecasters note that breezy conditions are possible Sunday, while the primary weather impact next week will be Tuesday evening thunderstorms followed by a midweek temperature drop.
For commuters and students traveling Tuesday evening, developing storms could briefly affect evening travel before cooler air arrives Wednesday.
Residents can monitor updated forecasts and potential storm timing at weather.gov/chicago.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness. Follow us on Instagram & Facebook and support local independent news. Have a tip? Message us. 🌦️
