July weather forecast
Des Plaines, IL

Weather in July

July, like June, in Des Plaines, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 66.9°F (19.4°C) and 80.6°F (27°C).

Temperature

With an average high-temperature of 80.6°F (27°C) and an average low-temperature of 66.9°F (19.4°C), July is the warmest month.

Heat index

In July, the average heat index is computed to be 84.2°F (29°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, pregnancy, clothing), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in July is 75%.

Rainfall

In Des Plaines, Illinois, it is raining for 17.8 days, with typically 3.46" (88mm) of accumulated precipitation. Throughout the year, there are 153.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In July, the average length of the day is 14h and 53min.
On the first day of the month, sunrise is at 5:19 am and sunset at 8:31 pm. On the last day of July, in Des Plaines, sunrise is at 5:43 am and sunset at 8:11 pm CDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.3h of sunshine.

UV index

The months with the highest UV index in Des Plaines are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation 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. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the warmest month in Des Plaines?

With an average high-temperature of 80.6°F (27°C) and an average low-temperature of 66.9°F (19.4°C), July is the warmest month in Des Plaines, Illinois.

What is the temperature in July in Des Plaines?

The average high-temperature, in July, in Des Plaines, Illinois, is 80.6°F (27°C), while the average low-temperature is 66.9°F (19.4°C). in July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 84.2°F (29°C).

What is the average humidity in July in Des Plaines?

The average relative humidity in July in Des Plaines, Illinois, is 75%.

How many days does it rain in July in Des Plaines?

In Des Plaines, Illinois, in July, during 17.8 rainfall days, 3.46" (88mm) of precipitation is typically accumulated.

When it does not snow in Des Plaines?

In Des Plaines, Illinois, snow does not fall in June through September.

What is the average length of the day in July in Des Plaines?

In July, the average day length in Des Plaines is 14h and 53min.

What time are sunrise and sunset in July in Des Plaines?

On the first day of July in Des Plaines, sunrise is at 5:19 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:11 pm CDT.

What is the month with the most sunshine in Des Plaines?

July and August, with an average of 10.3h of sunshine, are months with the most sunshine in Des Plaines, Illinois.

How many hours of sunshine does Des Plaines have in July?

The average sunshine duration in July in Des Plaines, Illinois, is 10.3h.

What is the month with the highest UV index in Des Plaines?

June through 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 Des Plaines?

The average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
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
Des Plaines, IL

Average temperature in July - Des Plaines, IL
  • Average high temperature in July: 80.6°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in July: 66.9°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).

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Average pressure in July
Des Plaines, IL

Average pressure in July - Des Plaines, 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
Des Plaines, IL

Average wind speed in July - Des Plaines, IL
  • Average wind speed in July: 7mph

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

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Average humidity in July
Des Plaines, IL

Average humidity in July - Des Plaines, IL
  • Average humidity in July: 75%

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
Des Plaines, IL

Average rainfall in July - Des Plaines, IL
  • Average rainfall in July: 3.46"

The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is December (1.5").

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Average rainfall days in July
Des Plaines, IL

Average rainfall days in July - Des Plaines, IL
  • Average rainfall days in July: 17.8 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (5.3 days).

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Average snowfall in July
Des Plaines, IL

Average snowfall in July - Des Plaines, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is February (4.84").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Des Plaines, IL

Average snowfall days in July - Des Plaines, 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 daylight in July /
Average sunshine in July
Des Plaines, IL

Average daylight in July / Average sunshine in July - Des Plaines, IL
  • Average daylight in July: 14h and 53min

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 18min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in July
Des Plaines, IL

Average sunshine days in July - Des Plaines, IL
  • Average sunshine days in July: 10.5 days

The months with the most sunshine days are November and December (16.9 days).
The month with the least sunshine days is April (10.4 days).

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Average UV index in July
Des Plaines, IL

Average UV index in July - Des Plaines, 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 December (UV index 1).

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Average cloud cover in July
Des Plaines, IL

Average cloud cover in July - Des Plaines, IL
  • Average cloud cover in July: 29

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 29).

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Average visibility in July
Des Plaines, IL

Average visibility in July - Des Plaines, 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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