Chicago weather in August
August in Chicago averages 83°F by day and 66°F at night, with 4.0 inches of precipitation. It is the 2nd-warmest and 3rd-wettest month of the year here.
- Average high
- 83°F-2° vs July
- Average low
- 66°F0 nights below freezing
- Precipitation
- 4.0 in6 days with 0.1 in. or more
- Snow
- 0.0 in4 days at 90°F+
Is August a good time to visit Chicago?
Yes. August is one of the most comfortable months in Chicago by our rule (highs of 62 to 86°F, lows of 42°F or more and under 4.5 inches of precipitation). The most comfortable months overall are May to October.
Get outside in Chicago in August
August is made for being outside. Try Millennium Park, Grant Park, Lincoln Park. All things to do in Chicago.
On August 15 the sun rises at 5:59 am and sets at 7:50 pm, giving 13h 51m of daylight. Daylight all year.
What to pack for Chicago in August
- Summer clothes, with a light layer for air conditioning
- An umbrella or rain jacket
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
August nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| Chicago | 83°F | 66°F | 4.0 in | |
| Cicero, IL | 4 mi | 83°F | 66°F | 4.0 in |
| Evanston, IL | 14 mi | 83°F | 65°F | 4.3 in |
| Hammond, IN | 20 mi | 82°F | 62°F | 4.0 in |
| Arlington Heights, IL | 22 mi | 83°F | 65°F | 4.3 in |
| Naperville, IL | 24 mi | 84°F | 62°F | 4.4 in |
| Schaumburg, IL | 24 mi | 83°F | 65°F | 4.3 in |
Frequently asked questions
What is the weather like in Chicago in August?
In August, Chicago averages a high of 83°F and a low of 66°F, with 4.0 inches of precipitation (NOAA 1991-2020 normals).
Is August a good time to visit Chicago?
Yes. August is one of Chicago's most comfortable months by our rule: highs between 62°F and 86°F, lows of 42°F or more and modest rain.
Does it snow in Chicago in August?
Rarely. The August snowfall normal is under half an inch.
Before and after: Chicago in July and Chicago in September. All twelve months: Chicago weather by month.
NOAA NCEI 1991-2020 climate normals, station Chicago Midway Airport, IL, 5.6 miles from the city center; snowfall from Chicago Midway Airport 3Sw, IL.