July weather forecast
Northbrook, IL

Share

Weather in July

July in Northbrook, Illinois, is a moderately hot summer month, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 67.1°F (19.5°C).

Temperature

The warmest month is July, with an average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 67.1°F (19.5°C).

Humidity

In July, the average relative humidity is 76%.

Rainfall

In July, the rain falls for 18.4 days. Throughout July, 3.9" (99mm) of precipitation is accumulated. In Northbrook, during the entire year, the rain falls for 164.7 days and collects up to 35.28" (896mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Northbrook, the average length of the day in July 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, sunrise is at 5:44 am and sunset at 8:11 pm CDT.

Sunshine

The months with the most sunshine in Northbrook are July and August, with an average of 10.4h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In July, the maximum UV index of 6 transforms into these recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the hottest?

In Northbrook, July is the warmest month, with temperatures averaging a high of 79.2°F (26.2°C) and a low of 67.1°F (19.5°C).

What is the usual temperature for Northbrook in July?

The average high-temperature, in July, in Northbrook, is 79.2°F (26.2°C), while the average low-temperature is 67.1°F (19.5°C).

What is the average humidity in July?

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

How much does it rain in July?

In Northbrook, in July, it is raining for 18.4 days, with typically 3.9" (99mm) of accumulated precipitation.

When it does not snow?

In Northbrook, snow does not fall in June through September.

How many hours of daylight does Northbrook have in July?

The average day length in July is 14h and 53min.

What time are sunrise and sunset in July?

In July, on the first day of the month, 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.

What is the month with the most sunshine?

July and August, with an average of 10.4h of sunshine, are months with the most sunshine.

How many hours of sunshine does Northbrook have in July?

In Northbrook, the average sunshine duration in July is 10.4h.

What is the month with the highest UV index?

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

How high is the UV index in July?

In July, the average daily maximum UV index in Northbrook is 6. A UV Index value of 6 to 7 symbolizes a high health risk from 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
Northbrook, IL

Average temperature in July - Northbrook, IL
  • Average high temperature in July: 79.2°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in July: 67.1°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in July
Northbrook, IL

Average pressure in July - Northbrook, 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).

Average wind speed in July
Northbrook, IL

Average wind speed in July - Northbrook, IL
  • Average wind speed in July: 7.3mph

The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).

Average humidity in July
Northbrook, IL

Average humidity in July - Northbrook, IL
  • Average humidity in July: 76%

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

Average rainfall in July
Northbrook, IL

Average rainfall in July - Northbrook, IL
  • Average rainfall in July: 3.9"

The wettest months (with the highest rainfall) are May and June (4.57").
The driest month (with the least rainfall) is December (1.65").

Average rainfall days in July
Northbrook, IL

Average rainfall days in July - Northbrook, IL
  • Average rainfall days in July: 18.4 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (6.1 days).

Average snowfall in July
Northbrook, IL

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

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

Average snowfall days in July
Northbrook, IL

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

The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Northbrook, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in July
Northbrook, IL

Average sunshine days in July - Northbrook, IL
  • Average sunshine days in July: 9.3 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (9.2 days).

Average UV index in July
Northbrook, IL

Average UV index in July - Northbrook, 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
Northbrook, IL

Average cloud cover in July - Northbrook, IL
  • Average cloud cover in July: 28

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 28).

Average visibility in July
Northbrook, IL

Average visibility in July - Northbrook, 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).

Northbrook, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location