Chicago, Illinois – A calm but cool stretch near Lake Michigan will quickly give way to a warmer, stormier pattern starting Sunday, with a growing risk for severe weather by early next week.
According to the National Weather Service in Chicago, cooler conditions will hold through Friday and Saturday, especially along the lakefront where temperatures remain in the 40s and 50s. Inland areas may warm slightly more, but overall conditions stay mild and quiet to start the weekend.
Changes begin Sunday as warmer, more humid air moves into Illinois. Highs will climb into the 70s and near 80 degrees, fueling scattered showers and thunderstorms by the afternoon and evening. That pattern continues into Monday with periodic rain and storms.
The greatest concern arrives Tuesday into Wednesday, when some thunderstorms could become severe. While specific impacts are still developing, strong winds, heavy rain, and lightning are all possible across the Chicago metro and surrounding areas, including Joliet, Naperville, and Waukegan.
Residents should monitor updates closely and prepare for changing conditions after a quiet start to the weekend.
Five Day Forecast for Chicago, Illinois:
Friday: High 46–60, low 33–38, rain ending early then cooler
Saturday: High 52–64, low 43–54, isolated late-day showers possible
Sunday: High 71–79, low 58–62, breezy with scattered showers and storms
Monday: High 76–81, low 58–66, periods of showers and thunderstorms
Tuesday: High 77–83, low 56–65, storms likely with potential for stronger activity
