Weather in Chicago in August
Chicago, United States averages a high of 26.6°C (79.9°F) and low of 19.7°C (67.5°F) in August, with 11 rain days and 11.5 hours of daily sunshine. Travel score: 81.5/100 (Excellent). The best time to visit Chicago is September.
High
27°C80°F
Low
20°C67°F
🌧️
11
rain days
☀️
11.5
hrs/day sunshine
💧
72%
humidity
82— Excellent
August in Chicago is warm and occasionally wet — ideal for sightseeing and outdoor activities.
What are the average temperatures in Chicago?
How much does it rain in Chicago in August?
Chicago receives an average of 99.3mm of rainfall across 11 rainy days in August. The annual total is 988.7mm.
What should I pack for Chicago in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (11 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to United States in August?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31