Chicago Weather by Month
Twelve months of Chicago, United States weather — averages from 2006–2025.
Chicago's warmest month is July (average high 26.8°C (80.2°F)) and the coolest is January (-0.5°C (31.1°F)). The most rain falls in July (about 113 mm), and November is the driest (about 57 mm). July is the sunniest, with about 12.1 hours of sunshine a day.
Best months to visit Chicago
Ranked within Chicago's own year by temperature comfort, rainy days and sunshine — historical averages, not a forecast.
Chicago month by month
January
PoorHigh -0.5°C (31.1°F)
Low -7°C (19.4°F)
- Rainfall
- 60 mm (2.4 in)
- Rainy days
- 9 rainy days
- Sunshine
- 5.5 h sunshine / day
February
PoorHigh 0.3°C (32.5°F)
Low -7.2°C (19°F)
- Rainfall
- 60 mm (2.3 in)
- Rainy days
- 8 rainy days
- Sunshine
- 7 h sunshine / day
March
FairHigh 6.1°C (43°F)
Low -1.1°C (30°F)
- Rainfall
- 78 mm (3.1 in)
- Rainy days
- 10 rainy days
- Sunshine
- 8.3 h sunshine / day
April
FairHigh 11.8°C (53.2°F)
Low 4.3°C (39.7°F)
- Rainfall
- 104 mm (4.1 in)
- Rainy days
- 13 rainy days
- Sunshine
- 9.1 h sunshine / day
May
GoodHigh 18.2°C (64.8°F)
Low 10.7°C (51.3°F)
- Rainfall
- 110 mm (4.3 in)
- Rainy days
- 12 rainy days
- Sunshine
- 10.5 h sunshine / day
June
GoodHigh 24.5°C (76.1°F)
Low 17°C (62.6°F)
- Rainfall
- 107 mm (4.2 in)
- Rainy days
- 12 rainy days
- Sunshine
- 11.8 h sunshine / day
July
GoodHigh 26.8°C (80.2°F)
Low 20°C (68°F)
- Rainfall
- 113 mm (4.4 in)
- Rainy days
- 11 rainy days
- Sunshine
- 12.1 h sunshine / day
August
GoodHigh 26.1°C (79°F)
Low 19.6°C (67.3°F)
- Rainfall
- 99 mm (3.9 in)
- Rainy days
- 11 rainy days
- Sunshine
- 11.6 h sunshine / day
September
GreatHigh 22.6°C (72.7°F)
Low 16.1°C (61°F)
- Rainfall
- 89 mm (3.5 in)
- Rainy days
- 9 rainy days
- Sunshine
- 9.9 h sunshine / day
October
GoodHigh 15.8°C (60.4°F)
Low 9.4°C (48.9°F)
- Rainfall
- 105 mm (4.1 in)
- Rainy days
- 11 rainy days
- Sunshine
- 7.7 h sunshine / day
November
FairHigh 8.4°C (47.1°F)
Low 2.4°C (36.3°F)
- Rainfall
- 57 mm (2.2 in)
- Rainy days
- 8 rainy days
- Sunshine
- 6.1 h sunshine / day
December
PoorHigh 2.6°C (36.7°F)
Low -3.3°C (26.1°F)
- Rainfall
- 72 mm (2.8 in)
- Rainy days
- 10 rainy days
- Sunshine
- 4.8 h sunshine / day
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Based on 20 years of historical weather data (2006–2025) from Open-Meteo. Monthly averages, not a forecast.