Chicago in August
The weather in August
In August, Chicago averages daytime highs of 81° and night-time lows of 67° — warm weather by day. Expect around 4.6 in of precipitation spread over about 13 wet days, with average cloud cover near 30%.
Temperatures are much the same as in July, and September is cooler again by about 3.7°. The sea averages 73°, pleasant for a swim.
August scores 60/100 — fair conditions for sightseeing — and ranks 5th of the twelve months for Chicago. For the most comfortable weather, consider May, September and October instead.
Around the middle of the month the sun rises at 05:59 and sets at 19:52 local time, giving 13 h 53 min of daylight. Days shorten by 73 minutes over the month.
Why 60/100?
How the score for August is builtBeach score this month: 77/100 (adds sea temperature and heat).
Comfort peaks for daytime highs between 18° and 25°C (64–77°F).
Festivals in Chicago in August
- LollapaloozaMusic festivalChicago
Only the month is given: the exact dates change from year to year.
Around Chicago this month
United States's best in August
Salinas
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Coos Bay
Chicago in August: quick answers
Is August a good time to visit Chicago?
August scores 60/100 for Chicago, which we rate as fair. Average highs are 81°F with 13 wet days.
How warm is Chicago in August?
Daytime highs average 81°F and night-time lows 67°F in August.
Does it rain a lot in Chicago in August?
Chicago receives about 4.6 in of precipitation in August, falling on around 13 days.
Can you swim in Chicago in August?
The sea averages 73°F in August, warm enough for most swimmers.