Weather in Chicago in August
In an average August, Chicago sees a daily high around 81°F and a low around 65°F, based on 1980–2026 of local climate records.
| Average high | 81°F |
|---|---|
| Typical high range | 75°F to 88°F |
| Average low | 65°F |
| Typical low range | 57°F to 72°F |
| Average daily precipitation | 0.10 in |
August records
The most extreme August on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
99°F
1988-08-17
Lowest
61°F
2004-08-12
Low
Highest
80°F
2023-08-24
Lowest
44°F
1986-08-28
Feels-like
Highest
140°F
1983-08-19
Lowest
39°F
1986-08-28
Humidity
Highest
24.7 g/m³
2023-08-24
Lowest
6.8 g/m³
1986-08-28
Wind
Highest
20 mph
1997-08-15
Lowest
4 mph
2005-08-29
Gust
Highest
43 mph
1997-08-15
Lowest
9 mph
2021-08-03
Precip
Wettest
8.36 in
1987
Driest
1.19 in
2020
See Chicago's live weather grade →
Visiting Chicago in August? See how its comfort stacks up against where you live.
Compare Chicago with your city →