Weather
Northern Illinois Weather Oct. 20-24: Warm, Dry Stretch Lasts Into Weekend
Chicago, IL – An extended stretch of warm, dry October weather is expected across northeastern Illinois and northwestern Indiana through Saturday, October 24, with afternoon temperatures reaching the
By Nora Whitfield · 2026-10-20T10:51:53.343Z
Chicago, IL – An extended stretch of warm, dry October weather is expected across northeastern Illinois and northwestern Indiana through Saturday, October 24, with afternoon temperatures reaching the 70s and patchy fog potentially affecting some morning commutes.
According to the National Weather Service in Chicago, sunshine will dominate the forecast through the upcoming weekend, although areas of fog could develop during the early morning hours over the next several days.
Tuesday, October 20, will bring mostly sunny skies , with afternoon highs ranging from 68 to 73 degrees across much of the region.
Temperatures near Lake Michigan are expected to remain cooler, generally reaching the middle 60s.
Overnight lows will fall between 40 and 45 degrees across much of the forecast area, with temperatures remaining in the upper 40s in Chicago.
Wednesday will bring another sunny and warm afternoon, with highs climbing between 70 and 75 degrees.
Morning fog remains possible in portions of northeastern Illinois and northwestern Indiana, potentially reducing visibility in localized areas before conditions improve.
Thursday, October 22, will continue the warming trend, with highs again reaching 70 to 75 degrees. Overnight lows are expected between 45 and 50 degrees.
The warm and dry pattern is expected to continue into the weekend.
Friday will feature partly sunny skies and afternoon temperatures between 68 and 73 degrees.
Saturday, October 24, will bring similar conditions, with highs again ranging from 68 to 73 degrees and overnight lows generally in the upper 40s.
Communities across Cook, DuPage, Lake and Will counties in Illinois, along with nearby northwest Indiana, can expect favorable conditions for outdoor activities throughout much of the week.
Drivers traveling during the early morning hours should remain alert for localized fog, particularly in areas where visibility changes quickly.
No significant rainfall is indicated in the five day outlook.