July weather forecast and climate
Chicago, IL

The city of Chicago in Illinois on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street
The city of Chicago in Illinois on the shores of Lake Michigan, with a superb view of the sandy beach of Oak Street

Weather in July

July in Chicago, Illinois, is a moderately hot summer month, with average temperature ranging between max 77.4°F (25.2°C) and min 67.8°F (19.9°C).

Temperature

In July, the average high-temperature marginally rises, from a pleasant 70.5°F (21.4°C) in June, to a moderately hot 77.4°F (25.2°C). The average low-temperature, in July, is 67.8°F (19.9°C).

Humidity

The average relative humidity in Chicago is 78%.

Rainfall

In Chicago, in July, during 18.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated. In Chicago, during the entire year, the rain falls for 160.2 days and collects up to 36.97" (939mm) of precipitation.

Snowfall

June through October are months without snowfall in Chicago.

Ocean temperature

In July, the average ocean temperature is 70.7°F (21.5°C).
Note: For most, swimming in 70.7°F (21.5°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In July, the average length of the day is 14.9h.

Sunshine

July and August, with an average of 10.6h of sunshine, are months with the most sunshine.

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index in Chicago, Illinois. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in July interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in July in Chicago?

The average high-temperature, in July, is 77.4°F (25.2°C), while the average low-temperature is 67.8°F (19.9°C).

What is the average humidity in July in Chicago?

In July, the average relative humidity in Chicago, Illinois, is 78%.

How much does it rain in Chicago in July?

In Chicago, in July, during 18.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated.

When it does not snow in Chicago?

June through October are months without snowfall in Chicago, Illinois.

What is the ocean temperature in July in Chicago?

In Chicago, Illinois, in July, the average water temperature is 70.7°F (21.5°C). Swimming in 70.7°F (21.5°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Chicago have in July?

In July, the average length of the day is 14.9h.

What are the months with the most sunshine in Chicago?

Months with the most sunshine are July and August, with an average of 10.6h of sunshine.

How long on average sun shines in July in Chicago?

In July, the average sunshine in Chicago, Illinois, is 10.6h.

When is the highest UV index in Chicago?

July and August, with an average maximum UV index of 6, are months with the highest UV index in Chicago.

What is the UV index intensity in July in Chicago?

In July, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in July
Chicago, IL

Average temperature in July - Chicago, IL
  • Average high temperature in July: 25.2°C

The warmest month (with the highest average high temperature) is August (25.3°C).
The month with the lowest average high temperature is January (-1.3°C).

  • Average low temperature in July: 19.9°C

The month with the highest average low temperature is July (19.9°C).
The coldest month (with the lowest average low temperature) is January (-6.3°C).

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Average pressure in July
Chicago, IL

Average pressure in July - Chicago, IL
  • Average pressure in July: 1014.9mbar

The month with the highest atmospheric pressure is January (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).

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Average wind speed in July
Chicago, IL

Average wind speed in July - Chicago, IL
  • Average wind speed in July: 12.4km/h

The windiest month (with the highest average wind speed) is January (20.1km/h).
The calmest month (with the lowest average wind speed) is July (12.4km/h).

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Average humidity in July
Chicago, IL

Average humidity in July - Chicago, IL
  • Average humidity in July: 78%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in July
Chicago, IL

Average rainfall in July - Chicago, IL
  • Average rainfall in July: 107mm

The wettest month (with the highest rainfall) is June (124mm).
The driest month (with the least rainfall) is December (42mm).

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Average rainfall days in July
Chicago, IL

Average rainfall days in July - Chicago, IL
  • Average rainfall days in July: 18.5 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.5 days).

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Average snowfall in July
Chicago, IL

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

The month with the highest snowfall is February (90mm).
Months with the least snowfall are June, July, August, September and October (0mm).

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Average snowfall days in July
Chicago, IL

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 (10.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in July
Chicago, IL

Average sea temperature in July - Chicago, IL
  • 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).

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Average daylight in July /
Average sunshine in July
Chicago, IL

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 the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in July: 10.6h

Months with the most sunshine are July and August (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in July
Chicago, IL

Average sunshine days in July - Chicago, IL
  • Average sunshine days in July: 9.3 days

The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in July
Chicago, IL

Average UV index in July - Chicago, IL
  • Average UV index in July: 6

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in July
Chicago, IL

Average cloud cover in July - Chicago, IL
  • Average cloud cover in July: 27

The month with the most cloud cover is January (Cloud cover 62).
Months with the least cloud cover are July and August (Cloud cover 27).

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Average visibility in July
Chicago, IL

Average visibility in July - Chicago, IL
  • Average visibility in July: 9km

Months with the highest visibility are September and October (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, November and December (9km).

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