Weather
Chicago, IL Weather Oct. 24-27: Near 80° Before Cooler Air
Chicago, IL – An unusually warm stretch of October weather will continue across Chicago and northern Illinois this weekend, with afternoon temperatures climbing into the 70s before cooler northeast wi
By Dylan Reeves · 2026-10-23T21:37:38.072Z
Chicago, IL – An unusually warm stretch of October weather will continue across Chicago and northern Illinois this weekend, with afternoon temperatures climbing into the 70s before cooler northeast winds create a noticeable temperature divide early next week.
According to the National Weather Service NWS in Chicago, dry and unseasonably warm conditions are expected through Sunday, October 25, with temperatures approaching 80 degrees in parts of the region.
Warm Weekend Ahead, But Lakeshore Stays Cooler
Saturday, October 24, will bring partly sunny skies and highs ranging from 70 to 75 degrees across much of the Chicago forecast area.
Communities near the Illinois lakeshore could remain cooler, with temperatures holding in the 60s.
Sunday, October 25, looks slightly warmer, with afternoon highs between 73 and 78 degrees across much of northern Illinois. Lakeshore communities may again experience cooler conditions.
The mild temperatures should provide favorable conditions for fall festivals, outdoor recreation and weekend travel across Cook, DuPage, Will and surrounding counties.
Temperature Divide Develops Monday
A change arrives Monday, October 26, as northeasterly winds bring cooler air into areas north of Interstate 80.
Highs north of I 80 are forecast between 60 and 68 degrees, while communities south of the interstate could remain warmer, reaching 68 to 74 degrees.
The temperature difference is expected to continue Tuesday, October 27, with highs of 60 to 68 degrees north of I 80 and 68 to 73 degrees farther south.
Patchy Fog Possible Friday Night
Before the warm weekend begins, patchy shallow fog could develop outside Chicago Friday night, October 23.
Overnight lows are expected between 42 and 49 degrees across the region, with temperatures in the lower 50s in Chicago.
Despite the temperature changes, the NWS expects dry weather to continue into early next week.
Residents should monitor updated forecasts, particularly near Lake Michigan, where cooler winds may produce noticeable differences in afternoon temperatures.