Chicago, IL – Illinois will enjoy a calm start to the week with clear skies and highs near 79 on Monday, September 15. Commuters along I-90 and I-55 should expect smooth travel conditions early, but midweek brings a sharp change.
According to the National Weather Service, Monday and Tuesday will feature sunshine, light winds, and above-normal highs in the upper 70s to low 80s. However, storms are expected to develop by Thursday, raising concerns for heavy rainfall and slick roads across Cook County and surrounding suburbs.
Chicago residents should use early-week sunshine to prepare for unsettled weather later. Charge electronic devices, clear storm drains, and check travel plans. The storm system could disrupt flights at Midway and O’Hare by late Thursday into Friday.
Monday night will stay mostly clear with lows in the upper 60s. Tuesday remains warm and sunny, peaking near 80, ideal for outdoor plans. By Wednesday, clouds return, and highs climb to 81 before the first round of storms approaches overnight.
Showers and thunderstorms could bring brief downpours Thursday into Friday, with rainfall creating hazards on major roadways including I-94 and Lake Shore Drive. Temperatures cool slightly into the mid-70s Friday before drier air returns Saturday.
Residents should stay alert for weather advisories later this week. If storms strengthen, additional warnings are possible through Friday morning.
Five Day Forecast for Chicago, IL
- Monday: Sunny, high 79, low 66.
- Tuesday: Sunny, high 80, low 67.
- Wednesday: Sunny, high 81, low 68.
- Thursday: Showers and thunderstorms, high 77, low 66.
- Friday: Chance of storms, high 75, low 61.
