July weather forecast
Chicago, IL

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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 is marked by warm, long days and is one of the city's peak summer months. There is minimal variation in weather conditions from June, making it comfortably predictable for locals and tourists alike. The highest average temperatures of the year, up to 77.5°F (25.3°C), are experienced this month. The minimal rainfall, warm temperatures, and long days contribute to making July an attractive time for outdoor activities. Be it lazing on the beach or enjoying a music festival, July is a vibrant month to be in the city.

Temperature

As June transitions into July in Chicago, a subtle temperature shift is observed, with average highs adjusting from an agreeable 70.5°F (21.4°C) to a warm 77.4°F (25.2°C). An average low-temperature of 67.8°F (19.9°C) is anticipated throughout the nights during July.

Humidity

The average relative humidity in July is 78%.

Rainfall

In Chicago, Illinois, in July, during 18.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated. Throughout the year, there are 160.2 rainfall days, and 36.97" (939mm) of precipitation is accumulated.

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: Swimming in water with a temperature of 70.7°F (21.5°C) is not a pleasurable experience for the majority. As the temperature falls below 69.8°F (21°C), it becomes increasingly hard to control one's breathing.

Daylight

In July, the average length of the day is 14h and 52min.
On the first day of July, sunrise is at 5:19 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:09 pm CDT.

Sunshine

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

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 6 in July suggests the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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Frequently asked questions

What is the temperature in July in Chicago?

The high-temperature during July is 77.4°F (25.2°C) and the 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 many days does it rain in July in Chicago?

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, in July, the average water temperature is 70.7°F (21.5°C). For swimming, a surface water temperature of 70.7°F (21.5°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°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 is the sunrise / sunset in July in Chicago?

In July, on the first day of the month, sunrise is at 5:19 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:09 pm CDT.

What are the months with the most sunshine in Chicago?

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

How many hours of sunshine does Chicago have in July?

In July, the average sunshine duration in Chicago, Illinois, 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 in Chicago.

How high is the UV index in July in Chicago?

The average daily maximum UV index in July in Chicago is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
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 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in July: 10h and 4min

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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Chicago, Illinois, USA

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