July weather forecast
Deerfield, IL

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Weather in July

July is a warm summer month in Deerfield, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 77.7°F (25.4°C).

Temperature

Deerfield witnesses the warmest weather in July, with temperatures averaging a high of 77.7°F (25.4°C) and a low of 66.7°F (19.3°C).

Humidity

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

Rainfall

In Deerfield, Illinois, in July, it is raining for 17.4 days, with typically 3.23" (82mm) of accumulated precipitation. Throughout the year, there are 154.1 rainfall days, and 30.24" (768mm) of precipitation is accumulated.

Snowfall

In Deerfield, snow does not fall in May through September.

Daylight

The average length of the day in July is 14h and 54min.
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, sunrise is at 5:44 am and sunset at 8:11 pm CDT.

Sunshine

In Deerfield, the average sunshine in July is 10.6h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 6 in July translates into these instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest?

July proves to be the warmest month, recording an average peak temperature of 77.7°F (25.4°C) and a minimum temperature of 66.7°F (19.3°C).

What is the usual temperature for Deerfield in July?

The high-temperature, in July, in Deerfield, records 77.7°F (25.4°C), while the low-temperature is 66.7°F (19.3°C).

What is the average humidity in July?

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

How many days does it rain in July?

In Deerfield, during July, the rain falls for 17.4 days and regularly aggregates up to 3.23" (82mm) of precipitation.

When it does not snow?

In Deerfield, snow does not fall in May through September.

How many hours of daylight does Deerfield have in July?

In July, the average day length is 14h and 54min.

When is the sunrise / sunset in July?

On the first day of July, sunrise is at 5:19 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:11 pm CDT.

How many hours of sunshine does Deerfield have in July?

The average sunshine duration in July is 10.6h.

What is the month with the highest UV index?

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

What is the UV index intensity in July?

In July, the average daily maximum UV index in Deerfield 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
Deerfield, IL

Average temperature in July - Deerfield, IL
  • Average high temperature in July: 77.7°F

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in July: 66.7°F

The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in July
Deerfield, IL

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

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in July
Deerfield, IL

Average wind speed in July - Deerfield, IL
  • Average wind speed in July: 7.5mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

Average humidity in July
Deerfield, IL

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

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

Average rainfall in July
Deerfield, IL

Average rainfall in July - Deerfield, IL
  • Average rainfall in July: 3.23"

The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").

Average rainfall days in July
Deerfield, IL

Average rainfall days in July - Deerfield, IL
  • Average rainfall days in July: 17.4 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in July
Deerfield, IL

Average snowfall in July - Deerfield, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in July
Deerfield, IL

Average snowfall days in July - Deerfield, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Deerfield, 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 month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in July
Deerfield, IL

Average sunshine days in July - Deerfield, IL
  • Average sunshine days in July: 11.5 days

The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).

Average UV index in July
Deerfield, IL

Average UV index in July - Deerfield, 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).

Average cloud cover in July
Deerfield, IL

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

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 27).

Average visibility in July
Deerfield, IL

Average visibility in July - Deerfield, 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).

Deerfield, Illinois, USA

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