Weather
Chicago, IL Weather Oct. 26-29: Highs Climb to 76°, Rain Returns
Chicago, IL – A warming trend is expected across the Chicago metropolitan area this week, with temperatures climbing into the 70s by midweek before a chance of rain arrives Thursday, October 29.
By Cole Barrett · 2026-10-25T20:12:42.003Z
Chicago, IL – A warming trend is expected across the Chicago metropolitan area this week, with temperatures climbing into the 70s by midweek before a chance of rain arrives Thursday, October 29.
According to the National Weather Service in Chicago, its latest four day outlook shows a noticeable temperature difference between communities north and south of Interstate 80 on Monday, followed by warmer conditions across northeastern Illinois.
Sunday Night, October 25: Lows of 47 53 Degrees
Cloudy conditions are expected overnight, with temperatures falling into the upper 40s and lower 50s.
Chicago and communities near Lake Michigan are expected to remain among the warmer locations overnight.
Monday, October 26: Highs of 59 74 Degrees
Monday brings partly to mostly cloudy skies, with a significant temperature difference across the region.
Areas north of I 80 are forecast to reach 59 to 65 degrees, while locations south of the interstate could climb between 65 and 74 degrees.
Overnight lows fall to 46 51 degrees.
Tuesday, October 27: Highs of 62 72 Degrees
Partly cloudy skies continue Tuesday, with the warmest conditions expected south of I 80.
Overnight temperatures remain relatively mild, dropping to 53 56 degrees.
Wednesday, October 28: Highs of 68 74 Degrees
Wednesday brings a further warmup, with partly sunny skies and afternoon temperatures reaching the upper 60s to middle 70s.
Overnight lows range from 55 to 58 degrees.
Thursday, October 29: Highs of 71 76 Degrees
Thursday is expected to be the warmest day of the forecast period, with temperatures climbing into the 70s across much of the region.
A chance of rain is also indicated, potentially affecting afternoon or evening outdoor plans. The forecast graphic does not specify rainfall amounts or exact timing.
No significant weather related travel disruptions are identified in the outlook, although commuters should monitor updates as Thursday approaches.
Residents across Chicago, Joliet, Naperville and surrounding communities can find location specific forecasts at weather.gov/chicago.