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Chicago in August: weather & travel advice
This month's data profile
Rain shapes the decision
Chicago in August is climatically well suited to city breaks and family holidays. The average daily high is around 25 °C. With about 13 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
75/100 · #2
Warmth
#1
Dryness
#9
Sun
#4
Published best categories: Overall, City break, Active, Family
Chicago · AugustPhoto: G B_NZ · CC BY-SA 2.0Climate facts
- Average high
- 25 °C
- Average low
- 20 °C
- Rainy days (est.)
- 13 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 77 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| July | 25 | 19 | 13 | 98 | 7.4 | 78 | 3.1 | 73 |
| August (selected) | 25 | 20 | 13 | 99 | 6.5 | 77 | 3.4 | 75 |
| September | 22 | 16 | 10 | 82 | 5.2 | 75 | 4.0 | 80 |
How do the previous and next months compare?
Baseline: August (75/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| July | -2 | -0.1 °C | -0.4 °C | +0.5 | -0.6 mm | +0.9 h | +1.7 % | -0.2 m/s |
| September | +5 | -3.1 °C | -3.7 °C | -2.5 | -16.5 mm | -1.3 h | -1.9 % | +0.6 m/s |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Chicago in August?
The average daily high is around 25 °C, with an average daily low of about 20 °C.
Does it rain a lot in Chicago in August?
The curated estimate is about 13 rainy days per month, not a directly measured long-term average. Total precipitation averages around 99 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Chicago?
By the climate score, June, July, August and September are the strongest months for Chicago. August is one of them.