July weather forecast
Lake Forest, IL

Weather in July

July is a moderately hot summer month in Lake Forest, Illinois, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 77.7°F (25.4°C).

Temperature

July is the warmest month, with an average high-temperature of 77.7°F (25.4°C) and an average low-temperature of 66.7°F (19.3°C).

Humidity

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

Rainfall

In Lake Forest, in July, it is raining for 17.4 days, with typically 3.23" (82mm) of accumulated precipitation. In Lake Forest, during the entire year, the rain falls for 154.1 days and collects up to 30.24" (768mm) of precipitation.

Snowfall

May through September are months without snowfall in Lake Forest, Illinois.

Daylight

The average length of the day in July in Lake Forest is 14h and 55min.
On the first day of the month, sunrise is at 5:18 am and sunset at 8:31 pm. On the last day of July, sunrise is at 5:43 am and sunset at 8:12 pm CDT.

Sunshine

In Lake Forest, Illinois, 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 in Lake Forest. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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.
[Resources]

FAQ

What is the warmest month in Lake Forest?

With an average high-temperature of 77.7°F (25.4°C) and an average low-temperature of 66.7°F (19.3°C), July is the warmest month.

What is the average humidity in July in Lake Forest?

In July, the average relative humidity in Lake Forest, Illinois, is 78%.

How much does it rain in Lake Forest in July?

In Lake Forest, Illinois, in July, during 17.4 rainfall days, 3.23" (82mm) of precipitation is typically accumulated.

When it does not snow in Lake Forest?

In Lake Forest, snow does not fall in May through September.

How many hours of daylight does Lake Forest have in July?

The average day length in July in Lake Forest, Illinois, is 14h and 55min.

What time are sunrise and sunset in July in Lake Forest?

In July, on the first day of the month, sunrise is at 5:18 am and sunset at 8:31 pm. On the last day of the month, in Lake Forest, sunrise is at 5:43 am and sunset at 8:12 pm CDT.

How long on average sun shines in July in Lake Forest?

The average sunshine duration in July is 10.6h.

When is the highest UV index in Lake Forest?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Lake Forest, Illinois.

What is the UV index reading in July in Lake Forest?

The average daily maximum UV index in July in Lake Forest, Illinois, is 6. A UV Index reading of 6 to 7 represents a high health threat 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
Lake Forest, IL

Average temperature in July - Lake Forest, 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).

[Resources]

Average pressure in July
Lake Forest, IL

Average pressure in July - Lake Forest, 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).

[Resources]

Average wind speed in July
Lake Forest, IL

Average wind speed in July - Lake Forest, 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).

[Resources]

Average humidity in July
Lake Forest, IL

Average humidity in July - Lake Forest, 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%).

[Resources]

Average rainfall in July
Lake Forest, IL

Average rainfall in July - Lake Forest, 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").

[Resources]

Average rainfall days in July
Lake Forest, IL

Average rainfall days in July - Lake Forest, 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).

[Resources]

Average snowfall in July
Lake Forest, IL

Average snowfall in July - Lake Forest, 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").

[Resources]

Average snowfall days in July
Lake Forest, IL

Average snowfall days in July - Lake Forest, 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).

[Resources]

Average daylight in July /
Average sunshine in July
Lake Forest, IL

Average daylight in July / Average sunshine in July - Lake Forest, IL
  • Average daylight in July: 14h and 55min

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 9min).

  • Average sunshine in July: 10h and 36min

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).

[Resources]

Average sunshine days in July
Lake Forest, IL

Average sunshine days in July - Lake Forest, 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).

[Resources]

Average UV index in July
Lake Forest, IL

Average UV index in July - Lake Forest, 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).

[Resources]

Average cloud cover in July
Lake Forest, IL

Average cloud cover in July - Lake Forest, 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).

[Resources]

Average visibility in July
Lake Forest, IL

Average visibility in July - Lake Forest, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location