Chicago in Summer — Weather & What to Expect
Summer in Chicago (June, July, August) averages daytime highs of 26.7°C and lows of 18.3°C, with around 388.4mm of rain across the season (33 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Chicago covers June, July, August.
Summer in Chicago month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 25.9°C | 16.6°C | 103.8mm | 10 | 9/10 |
| July | 27.2°C | 19.3°C | 172.8mm | 11 | 9/10 |
| August | 27.0°C | 19.1°C | 111.8mm | 12 | 9/10 |
What to pack for Chicago in summer
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Frequently Asked Questions
Is summer a good time to visit Chicago?
Summer in Chicago rates around 9/10 — excellent time to visit. Average highs are 26.7°C with 388.4mm of rain across the season.
How hot is Chicago in summer?
Daytime highs average 26.7°C (80.1°F) across June, July, August, with nights around 18.3°C.
What months are summer in Chicago?
Chicago is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Chicago · Chicago annual climate · Chicago in spring · Chicago in autumn · Chicago in winter
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Once you know what summer in Chicago looks like, find out exactly what to pack for Chicago at 247PackingList. For currency, language and country facts, see the United States guide at 247CountryInfo.
Summer in Chicago — what to pack
Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →Check clothing sizes in United States at 247Sizing before you shop.
More summer travel essentials
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.