Chicago
Illinois, USA
Long-term weather forecast
Long-term weather forecast
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July weather forecast and Climate
Chicago, IL

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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 witness lightning. Land breezes and the urban heat island effect that is prevalent in the city areas increase the intensity of the summer heat.
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  • The average high temperature in July: 29°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (-0.3°C).

  • The average low temperature in July: 19.7°C

The month with the highest average low temperature is July (19.7°C).
The coldest month (with the lowest average low temperature) is January (-7.7°C).

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  • The 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%).

  • The average rainfall in July: 101.9mm

The wettest month (with the highest rainfall) is May (104.9mm).
The driest month (with the lowest rainfall) is February (49.3mm).

  • The 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).

  • The average snowfall in July: 0mm

The month with the highest snowfall is January (292.1mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

  • The 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).

  • The average sea temperature in July: 21.5°C

The best month for swimming (with the highest average sea temperature) is August (23.3°C).
The coldest month (with the lowest average sea temperature) is February (2.7°C).

  • The average daylight in July: 15h

Months with the longest days are May, June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The 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).

  • The 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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