Weather in Chicago in August
August in Chicago is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In United States, this is how Chicago actually wears August, not how a country centroid would. August is the peak of the warm side of the year in Chicago. If you wanted the gentlest heat, this is not that month.
- Average temp
- 24°C
19–28°C
- Rainfall
- 104 mm
Showers likely
- Sunshine
- —
- Wind
- 12 km/h
What to expect
Daytime
Warm days in Chicago in August. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
August is a wetter month in Chicago. Showers are part of the deal, not a spoiled surprise.
Waterproof shoes matter more than a rain plan for a beach, especially if a beach is not why you came. Build indoor hours into the afternoon.
Evening
Evenings stay warm.
What to pack
Rain jacket
Where to stay in Chicago
Dates are a starting point for August.
Travel guides for Chicago
What to read before you book.
Average weather in Chicago
TemperatureRainfall
Similar weather in August
Other destinations whose August averages sit close to this one.
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FAQs about Chicago
Climate averages for Chicago, 1991–2020.
The best time to visit Chicago is between May and October, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 25°C.
May is the wettest month, with about 121 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
