July weather forecast and climate
Chicago, IL

An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
An aerial view of the city of Chicago in Illinois, on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
July is the hottest month of the year in Chicago as the temperatures cook up to 95°F (35°C). The average high temperature is 84°F (28.9°C), while the average low temperature is 63°F (17.2°C).
The Chicago sun is not blazing as some of the other American Midwest locations, and there are rare occurrences when the temperatures remain high for many consecutive days. July is wet with occasional heavy bursts of rain, and the nights often hear thunder and observers lightning. Land breezes and the urban heat island effect that is prevalent in the city areas increase the intensity of the summer heat.

What is the warmest month in Chicago?

July is the warmest month in Chicago, Illinois, with an average high-temperature of 84.2°F (29°C) and an average low-temperature of 67.5°F (19.7°C).

What is the average temperature in July in Chicago?

In Chicago, Illinois, in July, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 67.5°F (19.7°C).
Average temperature in July - Chicago, IL
  • Average high temperature in July: 84.2°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in July: 67.5°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.2°F).

Average humidity in July - Chicago, IL
  • Average humidity in July: 68.5%

The month with the highest relative humidity is December (75.5%).
The month with the lowest relative humidity is May (64.1%).

Average rainfall in July - Chicago, IL
  • Average rainfall in July: 4"

Wettest months (with the highest rainfall) are May and June (4.1").
The driest month (with the lowest rainfall) is February (1.9").

Average rainfall days in July - Chicago, IL
  • Average rainfall days in July: 9.9 days

The month with the highest number of rainy days is May (11.4 days).
The month with the lowest number of rainy days is September (8.2 days).

Average snowfall in July - Chicago, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is January (11.5").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in July - Chicago, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (8.1 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in July - Chicago, IL
  • Average sea temperature in July: 70.7°F

The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).

Average daylight in July / Average sunshine in July - Chicago, IL
  • Average daylight in July: 14.9h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in July: 10.3h

The month with most sunshine is June (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 3.4h).

Average UV index in July - Chicago, IL
  • Average UV index in July: 9

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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