July weather forecastProspect Heights, IL
July
Weather in July
July, the same as June, is another warm summer month in Prospect Heights, Illinois, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 66.4°F (19.1°C).Temperature
July tends to be the warmest month, with temperatures averaging a daily high of 81.1°F (27.3°C) and a low of 66.4°F (19.1°C).Heat index
The heat index value for July is evaluated at a hot 86°F (30°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
In July, the average relative humidity is 76%.Rainfall
In Prospect Heights, in July, during 17.7 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. Throughout the year, there are 153.3 rainfall days, and 30.12" (765mm) of precipitation is accumulated.Snowfall
In Prospect Heights, snow does not fall in June through September.Daylight
In Prospect Heights, the average length of the day in July is 14h and 53min.On the first day of the month, sunrise is at 5:20 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
July has the most sunshine of the year, with an average of 10.2h 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 value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 6 in July leads to these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Prospect Heights, IL
- Average high temperature in July: 81.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.2°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 (18°F).
Average pressure in July
Prospect Heights, 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
Prospect Heights, IL
- Average wind speed in July: 6.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in July
Prospect Heights, 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%).
Average rainfall in July
Prospect Heights, IL
- Average rainfall in July: 3.15"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.46").
Average rainfall days in July
Prospect Heights, IL
- Average rainfall days in July: 17.7 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in July
Prospect Heights, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Prospect Heights, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Prospect Heights, IL
- Average daylight in July: 14h and 54min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
Prospect Heights, IL
- Average sunshine days in July: 11.2 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in July
Prospect Heights, 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
Prospect Heights, IL
- Average cloud cover in July: 30
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in July
Prospect Heights, 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).
