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Chicago, IL Weather Tomorrow

Before heading out, check tomorrow's Chicago weather and the extended 5 day forecast featuring precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction across the Chicago area and around Cook county, Illinois.
Updated: Mon Sep 28th 2026 8:30 AM CDT
Chicago, IL Weather – 9-28 – Sunny
73° / 58°
Sunny
In Chicago, a sunny day is likely with a high near 73°F and a low around 58°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 7mph and gusts of 15.2mph at 4 PM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 67% at 11 PM and 39% being its lowest at 3 PM. Barometric pressure is its highest of 30.1inHg at 10 AM, a lowest point of 30.02inHg at 5 PM with an avg 30.05inHg.
Chicago, IL Weather – 9-29 – Overcast
77° / 60°

Weather Tomorrow

Overcast
Chicago may see cloud-filled skies, with daytime highs of 77°F and overnight lows near 60°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 9mph and gusts of 22.4mph at 11 PM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 78% at 7 AM and 34% being its lowest at 3 PM. Barometric pressure is its highest of 30.05inHg at 10 AM, a lowest point of 29.91inHg at 11 PM with an avg 29.99inHg.
Chicago, IL Weather – 9-30 – Overcast
80° / 66°
Overcast
Chicago could see cloud-filled skies with daytime highs of 80°F and nighttime lows near 66°F. There's a very small chance of rainfall, only about 10%. Wind will be moderate, blowing around 12mph on average and gusts of 32.7mph at 11 PM. Humidity levels should be comfortable, sitting around 43% on average, the maximum being 53% at 12 AM and 34% being its lowest at 1 PM. Barometric pressure is its highest of 29.91inHg at 3 AM, a lowest point of 29.81inHg at 11 PM with an avg 29.87inHg.
Chicago, IL Weather – 10-1 – Light Rain Shower
76° / 61°
Light Rain Shower
It will rain at times in Chicago, with a high of 76°F and a low of 61°F. The chance of rain is 81% with an estimated 0.45in. Wind will be moderate, blowing around 12mph on average and gusts of 35.3mph at 2 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 94% at 5 PM and 39% being its lowest at 12 AM. Barometric pressure is its highest of 30.11inHg at 10 PM, a lowest point of 29.8inHg at 4 AM with an avg 29.91inHg.
Chicago, IL Weather – 10-2 – Light Rain Shower
62° / 53°
Light Rain Shower
Highs will reach 62°F with lows near 53°F in Chicago, where rain is. Rainfall predicted to have a 57% chance with an estimated 0.06in. Wind will be moderate, blowing around 11mph on average and gusts of 21.7mph at 4 AM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 85% at 8 AM and 39% being its lowest at 2 PM. Barometric pressure is its highest of 30.31inHg at 7 PM, a lowest point of 30.12inHg at 12 AM with an avg 30.25inHg.
Chicago, IL Weather – 10-3 – Sunny
68° / 51°
Sunny
Daytime highs will reach 68°F with lows dropping to 51°F in Chicago, where bright and sunny conditions. There's a very small chance of rainfall, only about 4%. Winds will be light at 9mph and gusts of 17.9mph at 10 PM. Humidity levels should be comfortable, sitting around 46% on average, the maximum being 61% at 4 AM and 31% being its lowest at 4 PM. Barometric pressure is its highest of 30.29inHg at 12 AM, a lowest point of 30.03inHg at 11 PM with an avg 30.19inHg.

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