Chicago weather in August
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Chicago August weather at a glance
In August, Chicago averages 22.7°C, with typical highs of 26.8°C and lows of 19°C. The historical average is 6 wet days and 72% humidity.
Chicago August temperature & humidity
Chicago August rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Chicago in August
Choose breathable summer clothes and pack sun protection.
- DaytimeBreathable short sleeves, hat and sunscreen · average high 26.8°C
- Morning & eveningLight layer for air-conditioned rooms · average low 19°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Chicago August sunrise & sunset times
2026 August · Local time (America/Chicago)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-08-01 | 05:44 | 20:09 | 14h 24m |
| 2026-08-15 | 05:59 | 19:50 | 13h 52m |
| 2026-08-31 | 06:15 | 19:25 | 13h 10m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
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Forecast · Windy. Monthly averages are in the Temperature section.
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Best months to visit Chicago
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
August weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Chicago weather like in August?
In August, Chicago averages 22.7°C, with typical highs of 26.8°C and lows of 19°C. The historical average is 6 wet days and 72% humidity. Our weather-comfort rating for this month is excellent.
Does it rain a lot in Chicago in August?
There are about 6 wet days in August. A compact umbrella is still useful.
What should I wear in Chicago in August?
Choose breathable summer clothes and pack sun protection.
What are the best months to visit Chicago?
Recent weather data rates May, June, August, September among the more comfortable months.
Where can I check Chicago weather in August in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Chicago in August?
On 2026-08-15, calculated sunrise is 05:59 and sunset is 19:50 in local time (America/Chicago). Times vary by date and terrain.
Chicago weather by month
More Americas destinations in August
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations