Chicago, Illinois Weather in August
United States · August climate averages and travel tips
Avg high25°C (78°F)
Avg low20°C (69°F)
Rainfall98 mm (3.9 in)
RatingGood 7.5/10
Expect warm days in Chicago in August: the average high is 25°C (78°F) and the average low is 20°C (69°F). August is summer in United States. The month is moderately rainy, with about 98 mm (3.9 in) of rain spread over 12 days. You get roughly 13.7 hours of daylight and a mix of sun and cloud.
Is August a good time to visit Chicago?
August is a good time to visit Chicago (7.5/10), though September is even better.
August weather at a glance
| Average high | 25°C (78°F) |
|---|---|
| Average low | 20°C (69°F) |
| Daily mean | 23°C (73°F) |
| Rainfall | 98 mm (3.9 in) |
| Rainy days (1 mm+) | 12 |
| Humidity | 76% |
| Cloud cover | 46% |
| Daylight | 13.7 hours |
| Est. sunshine | 8.1 hours/day |
| Wind | 12 km/h |
| vs July | About as warm as July, with similar rainfall. |
What to pack for Chicago in August
- T-shirts plus a light layer for the evening
- an umbrella or rain jacket
Chicago weather in other months
Jan0°C / -5°C53 mmPoorFeb0°C / -5°C56 mmPoorMar5°C / 0°C66 mmFairApr10°C / 4°C93 mmFairMay16°C / 9°C105 mmGoodJun22°C / 16°C105 mmGoodJul25°C / 20°C101 mmGoodAug25°C / 20°C98 mmGoodSep22°C / 17°C86 mmExcellentOct16°C / 10°C99 mmGoodNov9°C / 4°C53 mmFairDec3°C / -2°C62 mmPoor
← JulyBest time to visit ChicagoSeptember →
Better weather in August nearby
- San Francisco, California23°C · 1 mm · Excellent
- Seattle, Washington24°C · 25 mm · Excellent
- Vancouver22°C · 32 mm · Excellent
- Victoria21°C · 26 mm · Excellent
- Calgary24°C · 62 mm · Excellent
- Honolulu, Hawaii28°C · 42 mm · Excellent
Nearby in August
- Nashville, Tennessee32°C · 107 mm
- Toronto25°C · 60 mm
- Washington, D.C., District of Columbia31°C · 110 mm
- Ottawa25°C · 94 mm
- Philadelphia, Pennsylvania30°C · 121 mm
- New York26°C · 115 mm
Where else is good in August? See where to go in August.