Chicago, Illinois – A stretch of cool, fall-like weather will settle over northern Illinois starting tonight, with overnight lows dipping into the 40s by the weekend. Breezy conditions and a few passing showers could make evenings feel even colder, particularly near Lake Michigan.
According to the National Weather Service in Chicago, a pair of storm systems will sweep across the region, bringing scattered rain tonight and again Thursday night before drier air arrives Friday. Wind gusts Thursday could make for hazardous waves along the lakefront, with forecasters warning of a high swim risk at northwest Indiana beaches.
Daytime highs will hold in the mid-60s to low 70s, but it’s the chilly overnight readings—dropping to 42° in outlying suburbs—that signal an early taste of fall. Commuters can expect crisp mornings, while those with outdoor plans near the lake should prepare for breezy, raw conditions Friday.
The weather pattern moderates early next week, with sunshine returning Monday and highs climbing back toward 70. Until then, residents should keep jackets handy and be ready for cooler nights.
Five Day Forecast for Chicago, Illinois
- Thursday: Showers early, windy lakeshore. High 65–70, low 51–58.
- Friday: Breezy, high swim risk at Indiana beaches. High 64–70, low 42–51.
- Saturday: Partly cloudy. High 66–72, low 42–51.
- Sunday: Mostly sunny. High 67–71, low 42–51.
- Monday: Sunny and milder. High 70–74, low 46–54.
