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Chicago Weather and climate

Data source：Meteostat
Update date：2025-09

Chicago year round climate
  • Spring (March–May): Average 5.5–18.4°C, the climate transitions from cold to warm, with more rainfall, but occasional warm sunshine. Common activities: Visiting museums, art galleries, and strolling through Millennium Park. Recommended clothing: Jacket, comfortable shoes, layers for temperature regulation.
  • Summer (June–August): Average 23.4–24.7°C, the climate is hot and humid, with significant rainfall, especially in July. Common activities: Swimming and boating on the lake, exploring Chicago's parks and neighborhoods, attending outdoor concerts. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 14.4–21.2°C, the climate is cool and comfortable, with decreased rainfall. Colorful autumn leaves are a feature of Chicago's autumn. Common activities: Viewing autumn leaves, touring Chicago's historic neighborhoods, enjoying autumnal cuisine. Recommended clothing: Light jacket, comfortable shoes.
  • Winter (December–February): Average -2.3–1.6°C, the climate is cold, with alternating snowfall and rainfall. Common activities: Visiting indoor museums and art galleries, ice skating, enjoying cozy indoor activities. Recommended clothing: Heavy warm coat, scarf, hat, gloves, thermal underwear.
Chicago climatological average

Annual average temperature: approx. 12.6°C / Annual rainfall: approx. 1003 mm / Summer humidity: 60%–80% / Rainiest month: July

Chicago monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-2.3°C
56.2
February
1.5°C
75.1
March
5.5°C
100.1
April
11.2°C
85.5
May
18.4°C
79
June
23.4°C
65.8
July
24.7°C
211.6
August
24.2°C
89.8
September
21.2°C
65.6
October
14.4°C
59
November
7.3°C
46.1
December
1.6°C
69.4
Chicago weather for the next seven days
10/13
Monday
Sunny
24.6°C/10.4°C
10/14
Tuesday
Overcast
16.9°C/15.2°C
10/15
Wednesday
Overcast
14.1°C/13.6°C
10/16
Thursday
Sunny
19.8°C/12°C
10/17
Friday
Sunny
22.9°C/15.5°C
10/18
Saturday
Patchy rain nearby
22.5°C/16.9°C
10/19
Sunday
Partly Cloudy
15.8°C/12.6°C

Chicago FAQ

Best time to visit Chicago?
The best time to visit Chicago is during the summer when the weather is at its best for outdoor activities. However, if you like winter ice sports, winter is also a good choice.
A must-see in Chicago?
Millennium Park, the Art Institute of Chicago, and Willis Tower Observation Deck are must-see attractions in Chicago. There is the famous Bean sculpture-Cloud Gate in Millennium Park, and the Art Institute of Chicago has a large collection of world-famous art works, including works by Van Gogh and Picasso. The Willis Tower Observation Deck offers stunning 360-degree views of Chicago.