Peak in July
Coolest in January
Heavy in May
Peak in dry season
Chicago Monthly Weather Guide
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January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for Chicago
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
The first Internet café in the United St...
Safety
Moderate Safety
GPI: 2.44
Best Time to Visit Chicago
Location, climate overview & historical trends
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📍 41.8780° N, 87.6290° W
Open in Google MapsChicago is a prominent destination in United States.
Located at 41.88°N latitude,Chicago experiences a temperate climate with four distinct seasons.
Based on 30 years of data, July is the warmest month (avg. 27°C), while January is the coolest. May sees the most rain (30% chance), making December the driest month.
Historical Climate Trend
30-Year Analysis+1.85°C
Total over 30 years
+0.62°C
Per decade
Linear regression analysis of historical maximum temperatures for Chicago, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)May, June, July
Best months to visit
14°C
Avg High
Based on 30 years of NASA satellite data,Chicago receives approximately 585mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
12.8°
2024 Avg
14.8°
2040 Proj
15.5°
+0.62°C
per decade (observed)
+0.45°C
per decade (CMIP6)
🌡️ Chicago has warmed by +1.9°C since 1995. By 2040, an additional +0.7°C is projected (based on CMIP6 rate of 0.447°C/decade), for a total of +2.6°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for Chicago
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Extremely busy airport
0
slots per day
Peak
Jun
Low
Jan
Monthly Traffic Distribution
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Health & Safety Advisory
CDC travel health recommendations
No Special Vaccinations Required
Standard travel precautions apply
Source: CDC Travelers' Health
View Complete Health GuideChicago Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | -1°C | 19% | ❄️ Cold |
| February | 1°C | 19% | ❄️ Cold |
| March | 6°C | 24% | Neutral |
| April | 12°C | 30% | Neutral |
| May | 18°C | 30% | 😊 Pleasant |
| June | 24°C | 28% | 😊 Pleasant |
| July | 27°C | 28% | 😊 Pleasant |
| August | 26°C | 25% | 😊 Pleasant |
| September | 23°C | 22% | ✨ Perfect |
| October | 16°C | 25% | 😊 Pleasant |
| November | 8°C | 20% | Neutral |
| December | 2°C | 19% | ❄️ Cold |
Weather in Cities Near Chicago
Explore climate data for popular destinations within easy reach
Nashville
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Canada
Washington DC
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Compare weather conditions with nearby destinations for your trip planning
Compare Chicago Weather vs Popular Destinations
Similar Climate Destinations
Discover destinations with weather similar to Chicago
Almaty
Kazakhstan
Amsterdam
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Antwerp
Belgium
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Bariloche
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Basel
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These destinations share similar weather patterns with Chicago. Perfect alternatives if you're looking for the same climate in a different location.
Chicago Weather FAQ
When is the best time to visit Chicago?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, May, June, July are usually great choices.
When is the hottest month in Chicago?
July is historically the hottest month in Chicago with average highs of 27°C.
When does it rain the most in Chicago?
May typically sees the highest probability of rain (30%).
Is Chicago expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.