Chicago Weather in August: Climate, Temperature & Travel Tips
Avg 22.7°C · 110mm rain — August is summer in Chicago.
- Avg high
- 26.4 °C
- Avg low
- 19.0 °C
- Avg
- 22.7 °C
- Precipitation
- 110 mm
Source: Open-Meteo Archive 2014–2023 · 10-year climate normals
Climate Overview
August in Chicago, United States brings summer conditions: average temperature 22.7°C, average high 26.4°C, average low 19.0°C. Monthly rainfall averages 110mm, making it a moderate-rainfall time of year.
Conditions are pleasant for most travel activities.
What to Pack
- Short sleeves and light pants; sunglasses
- Light shoes or sandals
- A light rain jacket as backup
Best Things to Do
- Walking tours and city exploration
- Parks and outdoor cafes
- Seasonal food and night markets (where applicable)
Pros and Cons of Visiting in August
Pros:
- Pleasant temperatures for walking and outdoor sightseeing
Cons:
- Peak season — expect higher prices and more crowds
Climate source: Open-Meteo Archive (2014–2023).
Colour = avg temperature · blue = cool · orange = warm
- 1 July 22.8°C
- 2 August 22.7°C
- 3 June 20.3°C
- 1 January -3.8°C
- 2 February -3.4°C
- 3 December 0.6°C
FAQ
01 What is the average temperature in Chicago in August? +
The average is 22.7°C, with a high of 26°C and a low of 19°C.
02 What is Chicago like to visit in August? +
It is summer in Chicago, which is ideal for outdoor exploration.
03 Does it rain often in Chicago during August? +
Average rainfall is 110mm, which is moderate.
04 What should I pack for Chicago in August? +
Short sleeves and light pants; sunglasses; Light shoes or sandals.
05 Is August a peak travel season for Chicago? +
Generally yes — book accommodations and flights well in advance.
06 Where does this climate data come from? +
Monthly averages computed from Open-Meteo Archive 2014–2023 daily observations.
- Sources
- Open-Meteo Archive 2014-2023
- Updated
- 2026-04-17