Chicago weather in July 2026

Q: How hot is it in Chicago in July?

Daytime temperatures usually reach 29°C in Chicago in July with moderate heat and humidity, falling to 17°C at night.

Q: How sunny is it in Chicago in July?

There are normally 10 hours of bright sunshine each day in Chicago in July - that's 69% of daylight hours.

Q: How warm is the sea around Chicago in July?

The average sea temperature around Chicago in July is 19°C.

Q: Does it rain in Chicago in July?

There are usually 10 days with some rain in Chicago in July and the average monthly rainfall is 100mm.

Expect daytime maximum temperatures of 29°C in Chicago, Illinois in July based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 100 mm of rainfall in the month.

29
29°C max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
17
17°C min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
100
100 mm of monthly rainfall
9
9 (Very High) UV index
19
19°C sea temperature

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The July weather guide for Illinois (Chicago) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)