Climate in Chicago (Illinois), United States of America

The graphs below show the monthly weather averages over the year.
* Data from weather station: Chicago, United States of America.

Average day and night temperature

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

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Daily percent of sunshine

The mean percent of sunhours during the day over the year

Monthly precipitation

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

Monthly rainy days

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

Average humidity

The mean monthly relative humidity over the year

Average wind speed

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

Weather Forecasts for Chicago (Illinois)

THU Sep 23
19°C | 10°C

Patchy rain possible

FRI Sep 24
28°C | 12°C

Partly cloudy

SAT Sep 25
22°C | 11°C

Moderate rain

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

Winter in Chicago is very variable. The average Chicago 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.

Here are some average weather facts we collected from our historical climate data:

  • During the month 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 25 degrees Celsius (77°F).
  • On average, the warmest month(s) are July and August.
  • The warmest month is July with an average maximum temperature of 29°C (85°F).
  • The coldest month is January with an average maximum temperature of 0°C (32°F).
  • May is the most wet month. This month should be avoided if you are not a big fan of rain.
  • February is the driest month.
  • July is the most sunny month.
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.