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Hourly Forecast
Daylight Hours
06:37
Sunrise
18:53
Sunset
Moon
Waxing Crescent
11:32
Moonrise
20:23
Moonset
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Weather in Chicago today, September 15, 2026
Expect a muted, overcast feel in Chicago on September 15, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief.
The temperature range runs from about 18°C up to 30°C. Expect humidity between 48% and 87%, most humid near 23:00. Winds stay light, near 3.7 km/h by 15:00, so the day feels still more than breezy.
Afternoon skies stay clogged, peaking close to 100% near 19:00. The grey theme continues rather than clearing out. Visibility holds near 16.0 km, though it can fall to 15.5 km. Expect sunrise at 06:37, sunset at 18:53, and 12 hours 15 minutes of sunlight today overall.
In short, cloud leads the story in Chicago on September 15, 2026; expect limited sun and a peak around 30°C.
Frequently asked questions about weather in Chicago
How warm does it get in Chicago?
The warmest month in Chicago is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in Chicago?
The coldest month in Chicago is January, with average low temperatures of -5°C. The average temperature during this period is around -3°C.
What is the wettest time of year in Chicago?
The wettest month in Chicago is May, with an average of 123mm of precipitation.
What is the driest time of year in Chicago?
The driest month in Chicago is February, with an average of 61mm of precipitation.
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