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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: Wed Sep 16th 2026 2:00 PM CDT
Chicago, IL Weather – 9-16 – Overcast
75° / 66°
Overcast
Chicago may see overcast, with daytime highs of 75°F and overnight lows near 66°F. Rainfall predicted to have a 53% chance with an estimated 0.02in. Winds will be light at 8mph and gusts of 13mph at 5 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 93% at 11 PM and 65% being its lowest at 3 PM. Barometric pressure is its highest of 30.28inHg at 3 PM, a lowest point of 30.24inHg at 7 PM with an avg 30.25inHg.
Chicago, IL Weather – 9-17 – Light Rain Shower
76° / 67°

Weather Tomorrow

Light Rain Shower
Chicago could see rain showers with daytime highs of 76°F and nighttime lows near 67°F. The chance of rain is 88% with an estimated 0.26in. Winds will be light at 7mph and gusts of 11.7mph at 11 PM. High humidity with average of 90% is anticipated, the maximum being 99% at 5 AM and 79% being its lowest at 12 PM. Barometric pressure is its highest of 30.25inHg at 8 AM, a lowest point of 30.18inHg at 5 PM with an avg 30.21inHg.
Chicago, IL Weather – 9-18 – Cloudy
76° / 65°
Cloudy
It will be cloudy in Chicago, with a high of 76°F and a low of 65°F. Rainfall predicted to have a 66% chance with an estimated 0.09in. Winds will be light at 9mph and gusts of 23.1mph at 9 PM. The humidity will be on the higher side, averaging about 78%, the maximum being 92% at 11 PM and 61% being its lowest at 12 PM. Barometric pressure is its highest of 30.23inHg at 9 AM, a lowest point of 30.04inHg at 11 PM with an avg 30.17inHg.
Chicago, IL Weather – 9-19 – Light Rain Shower
84° / 66°
Light Rain Shower
Periods of rain are likely in Chicago, with a high of 84°F and a low of 66°F. The chance of rain is 82% with an estimated 0.32in. Winds will be light at 10mph and gusts of 26.4mph at 2 AM. High humidity with average of 84% is anticipated, the maximum being 98% at 7 AM and 55% being its lowest at 4 PM. Barometric pressure is its highest of 30.03inHg at 12 AM, a lowest point of 29.83inHg at 11 PM with an avg 29.92inHg.
Chicago, IL Weather – 9-20 – Light Rain Shower
71° / 62°
Light Rain Shower
Chicago may see rain showers, with daytime highs of 71°F and overnight lows near 62°F. The chance of rain is 93% with an estimated 0.99in. Wind will be moderate, blowing around 11mph on average and gusts of 25.5mph at 6 AM. High humidity with average of 94% is anticipated, the maximum being 98% at 7 AM and 88% being its lowest at 1 PM. Barometric pressure is its highest of 29.94inHg at 10 PM, a lowest point of 29.83inHg at 5 AM with an avg 29.88inHg.
Chicago, IL Weather – 9-21 – Light Rain Shower
76° / 62°
Light Rain Shower
In Chicago, it will rain at times with highs near 76°F and lows around 62°F. The chance of rain is 86% with an estimated 0.19in. Winds will be light at 9mph and gusts of 18.7mph at 12 AM. High humidity with average of 86% is anticipated, the maximum being 97% at 6 AM and 71% being its lowest at 4 PM. Barometric pressure is its highest of 29.95inHg at 7 AM, a lowest point of 29.81inHg at 5 PM with an avg 29.87inHg.

Currently

Overcast 75°F
30.27 inHg.
Barometer
55%
Humidity
NE 10.1 mph
Wind
Overcast

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