Current Weather and Forecast in Chicago, IL
Illinois, United States 🇺🇸
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About the weather in Chicago
Chicago has a humid continental climate. July is the warmest month, with average highs of 80°, and January the coldest, when nights fall to around 20°. Over a whole year it rains on roughly 132 days.
Chicago climate guide: monthly averages, seasons and the best time to visit
Common questions
What is the best month to go to Chicago?
The best time to visit Chicago is generally May to October, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 73°F (23°C), with rain on about 12 days a month. For the same question asked the other way round, see where else is warm in May.
Which month is wettest in Chicago?
July, at 6.0 inches (152 mm) over about 12 days. February is the driest month, at 2.4 inches (61 mm).
What is the hottest month in Chicago?
July, averaging 80°F (27°C) by day and 67°F (19°C) overnight. The hottest single day in our 2015-2024 record for this location reached 99°F (37°C).
Is there snow in Chicago?
Yes - about 18 days a year carry measurable snowfall, concentrated November through April.
How much sun does Chicago get?
8.5 hours a day averaged over the year, peaking in July at 11.8 hours.
Which month is coolest in Chicago?
January, with highs of 32°F (0°C) and lows near 20°F (-6°C). The coldest day in the 2015-2024 record fell to -26°F (-32°C).