July weather forecast
Clarendon Hills, IL

Weather in July

July, the same as June, is another warm summer month in Clarendon Hills, Illinois, with an average temperature ranging between min 66.4°F (19.1°C) and max 82.4°F (28°C).

Temperature

With an average high-temperature of 82.4°F (28°C) and an average low-temperature of 66.4°F (19.1°C), July is the warmest month.

Heat index

In July, the average heat index is computed to be a tropical 88.7°F (31.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like wind, metabolic differences, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Clarendon Hills, the average relative humidity in July is 76%.

Rainfall

In Clarendon Hills, in July, it is raining for 14.6 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, in Clarendon Hills, there are 118.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.

Snowfall

In Clarendon Hills, snow does not fall in May through September.

Daylight

In July, the average length of the day in Clarendon Hills is 14h and 52min.
On the first day of July in Clarendon Hills, sunrise is at 5:20 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:11 pm CDT.

Sunshine

In Clarendon Hills, the average sunshine in July is 9.9h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Clarendon Hills?

With an average high-temperature of 82.4°F (28°C) and an average low-temperature of 66.4°F (19.1°C), July is the warmest month in Clarendon Hills, Illinois.

What is the temperature in July in Clarendon Hills?

In Clarendon Hills, Illinois, in July, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 66.4°F (19.1°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 88.7°F (31.5°C).

What is the average humidity in July in Clarendon Hills?

In Clarendon Hills, Illinois, the average relative humidity in July is 76%.

How much does it rain in Clarendon Hills in July?

In Clarendon Hills, during July, the rain falls for 14.6 days and regularly aggregates up to 1.61" (41mm) of precipitation.

When it does not snow in Clarendon Hills?

May through September are months without snowfall in Clarendon Hills, Illinois.

How many hours of daylight does Clarendon Hills have in July?

The average day length in July is 14h and 52min.

When are sunrise and sunset in July in Clarendon Hills?

On the first day of July in Clarendon Hills, Illinois, sunrise is at 5:20 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:11 pm CDT.

How long on average sun shines in July in Clarendon Hills?

In Clarendon Hills, Illinois, the average sunshine duration in July is 9.9h.

When is the highest UV index in Clarendon Hills?

The months with the highest UV index in Clarendon Hills are June through August, with an average maximum UV index of 6.

How high is the UV index in July in Clarendon Hills?

The average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in July
Clarendon Hills, IL

Average temperature in July - Clarendon Hills, IL
  • Average high temperature in July: 82.4°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in July: 66.4°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in July
Clarendon Hills, IL

Average pressure in July - Clarendon Hills, 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
Clarendon Hills, IL

Average wind speed in July - Clarendon Hills, IL
  • Average wind speed in July: 6.3mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in July
Clarendon Hills, IL

Average humidity in July - Clarendon Hills, IL
  • Average humidity in July: 76%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in July
Clarendon Hills, IL

Average rainfall in July - Clarendon Hills, IL
  • Average rainfall in July: 1.61"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").

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Average rainfall days in July
Clarendon Hills, IL

Average rainfall days in July - Clarendon Hills, IL
  • Average rainfall days in July: 14.6 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in July
Clarendon Hills, IL

Average snowfall in July - Clarendon Hills, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in July
Clarendon Hills, IL

Average snowfall days in July - Clarendon Hills, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Clarendon Hills, IL

Average daylight in July / Average sunshine in July - Clarendon Hills, IL
  • Average daylight in July: 14h and 52min

The month with the longest days is June (Average daylight: 15h and 10min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in July: 9.9h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in July
Clarendon Hills, IL

Average sunshine days in July - Clarendon Hills, IL
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in July
Clarendon Hills, IL

Average UV index in July - Clarendon Hills, IL
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in July
Clarendon Hills, IL

Average cloud cover in July - Clarendon Hills, IL
  • Average cloud cover in July: 32

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in July
Clarendon Hills, IL

Average visibility in July - Clarendon Hills, 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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