Chicago Weather in August
27.7°C high · 17.1°C low · 102 mm rain · 8.3h sun
Aug is a warm month in Chicago — not peak season, but a good time to avoid crowds.
August at a glance
| Metric | Value |
|---|---|
| Average high | 27.7°C |
| Average low | 17.1°C |
| Rainfall | 102 mm |
| Sunshine | 8.3 hours/day |
| Daylight | 13.7 hours |
What to pack in August
Pack comfortable clothes with a light layer for evenings, plus a raincoat and umbrella for Chicago in August.
Chicago weather by month
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Frequently asked questions
What is the weather in Chicago in August?
Highs of 27.7°C and lows of 17.1°C, with about 102 mm of rain and 8.3 hours of sunshine per day.
Is August a good time to visit Chicago?
Aug is a warm month in Chicago — not peak season, but a good time to avoid crowds.
What to do in Chicago · Best time to visit Chicago
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.