Chicago/ Weather & Environment

Foggy Chicago Commute Clears, Sun-Soaked 60s Stretch Into Weekend

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Published on October 20, 2026
Foggy Chicago Commute Clears, Sun-Soaked 60s Stretch Into WeekendSource: jewad alnabi / Unsplash

Chicago starts Tuesday under a blanket of dense fog, but the gray commute should give way to bright sunshine and a mild afternoon. Temperatures near 47 degrees early will climb into the mid-60s, with calm conditions giving way to a light east wind.

A Dense Fog Advisory remains in effect until 9 a.m., especially in Central Cook County north of the Eisenhower. The National Weather Service warns that visibility may drop sharply in spots, creating hazardous driving conditions during the early morning commute.

Sunshine Takes Over By Late Morning

Fog is expected to fade by around 8 a.m., followed by sunny skies for most of Tuesday. The high should reach about 65 degrees before temperatures ease back slightly during the afternoon, and rain is not expected.

Warm, Dry Pattern Hangs On

The mild stretch continues Wednesday with a high near 68 and mostly sunny skies after another possible round of early fog. Thursday should reach 67 under sunny skies, followed by highs near 65 Friday, 66 Saturday and 69 Sunday.

Overnight lows will stay relatively comfortable, ranging from the upper 40s to the mid-50s through the weekend. Another patch of fog is possible before 8 a.m. Wednesday, but the broader forecast remains notably dry and warmer than a typical late-October pattern.

Early Fog Is The Main Weather Hassle

For Tuesday morning, drivers should slow down, leave extra space and use headlights in areas where visibility is reduced. Once the fog lifts, the rest of the day looks like an easy one for outdoor plans, with light winds and plenty of sunshine.