Chicago Weather Alert: Fall Chill Brings 42° Overnight Lows This Weekend
CHICAGO, Illinois — A stretch of cool, fall-like weather will settle across northern Illinois beginning tonight, with overnight lows plunging into the 40s by the weekend. Breezy conditions and scattered showers are expected to make evenings feel even colder, particularly along the Lake Michigan shoreline.
Storm Systems and Lakefront Concerns
According to the National Weather Service in Chicago, two storm systems will sweep across the area, bringing rain tonight and again Thursday night. By Thursday, winds could generate hazardous waves along the lakefront, prompting warnings of a high swim risk at northwest Indiana beaches.
Daytime highs are expected to stay in the mid-60s to low 70s, but the true impact will be felt at night. Suburbs could see lows near 42°, an early taste of the fall season that will make for crisp commutes and chilly outdoor plans.
Weekend Forecast Brings First Taste of Fall
Friday will bring breezy weather and cooler air, with the most noticeable chill settling into outlying areas. Saturday and Sunday promise partly cloudy to mostly sunny skies, though overnight lows will still hover between 42° and 51°. Residents near the lakefront should prepare for raw, windy conditions that may linger into early Saturday morning.
By Sunday, sunshine should help moderate conditions slightly, though the fall-like chill will remain. Jackets and light layers are recommended for evening activities, especially for those attending outdoor concerts, festivals, or sporting events.
Looking Ahead to Next Week
The cooler trend will ease as Monday brings sunshine and daytime highs climb back toward 70°. Overnight lows will also rise into the upper 40s and low 50s, signaling a gradual return to milder September weather. Still, this weekend serves as a reminder that autumn is just around the corner.
As Chicago heads into its first real fall-like stretch, locals are encouraged to plan ahead for cooler nights and breezy outdoor conditions. For more updates on Chicago’s weather and upcoming local music events, visit ChicagoMusicGuide.com.