Climate in Chicago (Illinois, United States of America)

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year. Show in Fahrenheit

Average min and max temperatures in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Average monthly sunhours in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Daily percent of sunshine

The mean percent of sunhours during the day over the year

Average percent of sunshine in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc. Show in Inches

Average precipitation (rain/snow) in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average rainy days (rain/snow) in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Average humidity

The mean monthly relative humidity over the year

Average relative humidity in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Average wind speed

The mean monthly wind speed over the year (in meters per second)

Average wind speed in Chicago, the United States of America   Copyright © 2023  weather-and-climate.com

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Weather Forecasts for Chicago (Illinois)

Sun   Feb 05
5°C | -2°C
W 22 km/h
half cloudy and no rain

half cloudy and no rain

Mon   Feb 06
8°C | -4°C
SE 22 km/h
0.1 mm
broken clouds and no rain

broken clouds and no rain

Tue   Feb 07
9°C | 0°C
W 25 km/h
1.1 mm
broken clouds and no rain

broken clouds and no rain

The best time of year to visit Chicago in the United States of America

Chicago features a typical hot-summer humid continental climate, and experiences four distinct seasons. Winter in Chicago is very variable. The average winter produces 94 cm (38 inches) of snow. This is just an average, because most winters produce only a few snow falls during the season. Temperatures can vary wildly within the span of one week, but temperatures can often stay below freezing for several continues days or even weeks in January and February. The temperature in January averages about - 2 degrees Celsius (29°Fahrenheit) in the afternoon, and -10 degrees Celsius (14°Fahrenheit) at night.

On a typical summer day, humidity is usually high and temperatures ordinarily reach anywhere between 26°C to 33°C (78°F and 92°F). Overnight temperatures in summer usually drop to around 18°C (65°F). Thunderstorms occur during summer.

The best time to visit Chicago is May through September. Where the residents of Chicago prefer to stay indoors between November and March, they open the doors and celebrate starting April. This period the city comes alive since the sun increases in strength and occasionally rises above the skyscrapers. It can be a bit busy during this period so it is recommended to book a place to stay in advance.

During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius (68°F) and 26 degrees Celsius (79°F).

Other facts from our historical climate data:

  • Which is the warmest month in Chicago?
    July has an average maximum temperature of 30°C (85°F) and is the warmest month of the year.
  • Which is the coldest month in Chicago?
    The coldest month is January with an average maximum temperature of 1°C (33°F).
  • Which is the wettest month in Chicago?
    May tops the wettest month list with 121mm (4.8in) of rainfall.
  • Which is the driest month in Chicago?
    February is the driest month with 51mm (2.0in) of precipitation.
  • Which is the sunniest month in Chicago?
    July is the sunniest month with an average of 319 hours of sunshine.

  • No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.