July weather forecast
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 is a moderately hot summer month in Chicago, Illinois, with an average temperature fluctuating between 77.4°F (25.2°C) and 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 warm 77.4°F (25.2°C). The average low-temperature, in July, is 67.8°F (19.9°C).

Humidity

In July, the average relative humidity is 78%.

Rainfall

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

Snowfall

In Chicago, snow does not fall in June through October.

Ocean temperature

In Chicago, in July, the average water 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 Chicago, the average length of the day in July is 14h and 52min.
On the first day of the month, sunrise is at 5:19 am and sunset at 8:29 pm. On the last day of July, in Chicago, sunrise is at 5:43 am and sunset at 8:10 pm CDT.

Sunshine

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

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in July in Chicago?

In Chicago, Illinois, in July, the average high-temperature is 77.4°F (25.2°C), and the average low-temperature is 67.8°F (19.9°C).

What is the average humidity in July in Chicago?

The average relative humidity in July 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.

How cold is the water in July in Chicago?

In Chicago, in July, the average water temperature is 70.7°F (21.5°C). 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).

What is the average length of the day in July in Chicago?

In Chicago, the average day length in July is 14h and 52min.

When are sunrise and sunset in July in Chicago?

On the first day of July in Chicago, Illinois, sunrise is at 5:19 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:10 pm CDT.

What is the month with the most sunshine in Chicago?

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

How many hours of sunshine does Chicago have in July?

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

What is the month with the highest UV index in Chicago?

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

How high is the UV index in July in Chicago?

The average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Chicago, IL

Average temperature in July - Chicago, IL
  • Average high temperature in July: 77.4°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in July: 67.8°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in July
Chicago, IL

Average pressure in July - Chicago, IL
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Chicago, IL

Average wind speed in July - Chicago, IL
  • Average wind speed in July: 7.7mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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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: 4.21"

The wettest month (with the highest rainfall) is June (4.88").
The driest month (with the least rainfall) is December (1.65").

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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: 0"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").

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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).
The 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: 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).

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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: 14h and 52min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in July: 10h and 36min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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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

The months with the highest UV index are July and August (UV index 6).
The 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).
The 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: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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