Chicago: Weather Guide & Climate
Complete month-by-month weather guide: Chicago. Best time to visit: May, June, September, October. Plan your trip with detailed climate data.
Climate Overview
Chicago has a moderate climate with average yearly highs of 14°C, lows of 6°C, and approximately 11 rainy days per month.
The best time to visit Chicago is during May, June, September, October, when conditions are perfect for sightseeing and exploration
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Air Quality
Best Time
May, Jun, Sep, Oct
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 2°C | -4°C | 8 | Good |
| February | 1°C | -7°C | 9 | Good |
| March | 8°C | 0°C | 12 | Good |
| April | 11°C | 2°C | 16 | Wet |
| May | 17°C | 9°C | 14 | Excellent (best) |
| June | 25°C | 17°C | 14 | Excellent (best) |
| July | 28°C | 20°C | 14 | Wet |
| August | 27°C | 19°C | 9 | Good |
| September | 22°C | 14°C | 9 | Excellent (best) |
| October | 14°C | 6°C | 12 | Excellent (best) |
| November | 12°C | 3°C | 6 | Good |
| December | 3°C | -3°C | 5 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 2°C
Low: -5°C
Rainy days: 7 days/month
Spring
Mar–May
High: 12°C
Low: 4°C
Rainy days: 14 days/month
Summer
Jun–Aug
High: 27°C
Low: 19°C
Rainy days: 12 days/month
Autumn
Sep–Nov
High: 16°C
Low: 8°C
Rainy days: 9 days/month
Month-by-Month Weather Table
January
February
March
April
May
BestJune
BestJuly
August
September
BestOctober
BestNovember
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 2°C | -4°C | 8 | Good | View Details → |
| February | 1°C | -7°C | 9 | Good | View Details → |
| March | 8°C | 0°C | 12 | Good | View Details → |
| April | 11°C | 2°C | 16 | Wet | View Details → |
| May (best) | 17°C | 9°C | 14 | Excellent | View Details → |
| June (best) | 25°C | 17°C | 14 | Excellent | View Details → |
| July | 28°C | 20°C | 14 | Wet | View Details → |
| August | 27°C | 19°C | 9 | Good | View Details → |
| September (best) | 22°C | 14°C | 9 | Excellent | View Details → |
| October (best) | 14°C | 6°C | 12 | Excellent | View Details → |
| November | 12°C | 3°C | 6 | Good | View Details → |
| December | 3°C | -3°C | 5 | Good | View Details → |
Chicago
Architectural marvels with Cloud Gate (The Bean) and Architecture boat tour, deep-dish pizza, lakefront, and world-class museums.
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Common Questions
What type of climate does Chicago have?
Chicago has a Moderate climate with average yearly temperatures of 14°C (highs) and 6°C (lows).
When is the best time to visit Chicago?
The best time to visit Chicago is during May, June, September, October, when temperatures average around 17°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Chicago?
The hottest month in Chicago is July with average highs of 28°C, while the coldest is February with average lows of -7°C.
When is the rainy season in Chicago?
Chicago sees the most rain in April (16 rainy days), while December is the driest month (5 rainy days).
More Chicago Guides
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Overview
Complete travel guide for Chicago: top things to do, itineraries, and typical costs.