August · United States
Best time to visit Chicago in August Weather, crowds & prices
Weather in Chicago in August
Average temperature 23°C, 73 mm of rain, about 24 days with 6+ hours of sunshine and 74% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
8.3/10
Ranked #2 of 12 months
- Avg temp
- 23°C
- Rainfall
- 73 mm
- Humidity
- 74%
- Days with 6h+ sun
- 24
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Chicago scores 8.3/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 23°C, 73 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Lakefront architecture, deep-dish nights, and museum campuses peak May through September.
August in Chicago — reliably good (2nd best month)
August averages 23°C (73°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rainfall runs 73 mm, so plan one flexible day in three; you still get about 24 days with 6+ hours of sunshine and 13.7 hours of daylight.
It scores 8.3/10 here, 2nd of 12 months, against 8.7/10 in the destination's best month.
Pack light clothing, a hat and real sun protection, a packable rain layer.
Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Chicago in August?
- In August, Chicago averages 23°C, 73 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 8.3/10.
- Is August a good time to visit Chicago?
- August earns a 8.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Chicago in August?
- Expect about 73 mm of rain in August. Average humidity is 74% and there are about 24 days with 6+ hours of sunshine.
Curated in Chicago
Tickets & experiences
Things to do in Chicago
Chicago, United States. Live activities and tours from GetYourGuide, matched to this destination.