Chicago weather in July
In July, Chicago has an average high of 25 °C77 °F and an average low of 20 °C68 °F, with about 95 mm3.8 in of precipitation. It is the 2nd warmest month of the year and ranks 5th for precipitation.
How July compares with other months
Compared with June, July is 4.5 °C8 °F warmer on average and drier by 7 mm0.3 in. Compared with August, July is about the same temperature and drier by 10 mm0.4 in. Daylight lasts about 14.9 hours around the middle of the month. Average relative humidity is 78% and the average cloud amount 48%.
Is July a good time to visit Chicago?
Yes — July is one of the most comfortable months to visit Chicago by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in July
For Chicago in July, pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
July in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Chicago | 2577 | 2068 | 953.8 |
| Joliet | 2984 | 1865 | 1004.0 |
| Elgin | 2984 | 1864 | 1003.9 |
| Aurora | 2985 | 1865 | 1003.9 |
| South Bend | 2983 | 1864 | 1003.9 |
| Rockford | 2883 | 1864 | 1044.1 |
| Milwaukee | 2883 | 1864 | 943.7 |
| Madison | 2882 | 1763 | 1024.0 |
| Grand Rapids | 2781 | 1762 | 793.1 |
Nearby places that are more than 1 °C1.8 °F warmer in July: Joliet and Aurora.
Other months in Chicago
- January0 °C32 °F / −5 °C23 °F
- February0 °C33 °F / −5 °C23 °F
- March5 °C41 °F / −1 °C31 °F
- April10 °C50 °F / 4 °C39 °F
- May15 °C59 °F / 9 °C47 °F
- June21 °C70 °F / 15 °C59 °F
- July25 °C77 °F / 20 °C68 °F
- August25 °C77 °F / 20 °C68 °F
- September22 °C71 °F / 16 °C62 °F
- October15 °C59 °F / 10 °C49 °F
- November9 °C47 °F / 3 °C38 °F
- December3 °C37 °F / −2 °C29 °F
Frequently asked questions
How warm is Chicago in July?
In July the average high in Chicago is 25 °C (77 °F) and the average low is 20 °C (68 °F).
Does it rain a lot in Chicago in July?
On average about 95 mm (3.8 in) of precipitation falls in July; it ranks 5th of the 12 months.
Is July the warmest month in Chicago?
Yes. July is the warmest month in Chicago. The coldest month is February, with an average low of -5 °C (23 °F).
How long is the day in Chicago in July?
In the middle of July the day in Chicago lasts about 14.9 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Chicago in July?
The average relative humidity in July is about 78%. Combined with warm days, it can feel muggy.
How cloudy is Chicago in July?
On average about 48% of the sky is covered by cloud in July. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.