July weather forecastWheaton, IL
July
Weather in July
The peak of summer arrives in Wheaton in July. This month records the highest temperatures, ranging from 81.7°F (27.6°C) to 65.3°F (18.5°C). Relative humidity levels and daylight hours pretty much maintain the trend set in June. Rainfall decreases slightly, while visibility remains consistent throughout. Despite being the most sultry month, weather conditions in July make it a popular time for outdoor events and recreational activities.Temperature
In Wheaton, temperatures reach their average annual highs in July, measuring 81.7°F (27.6°C) and a minimum average of 65.3°F (18.5°C).Heat index
For July, the heat index is appraised at a hot 87.8°F (31°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
In Wheaton, the average relative humidity in July is 78%.Rainfall
In July, the rain falls for 20.1 days. Throughout July, 3.7" (94mm) of precipitation is accumulated. In Wheaton, during the entire year, the rain falls for 164.3 days and collects up to 33.78" (858mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In July, the average length of the day in Wheaton is 14h and 52min.On the first day of July, sunrise is at 5:21 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:11 pm CDT.
Sunshine
In Wheaton, the average sunshine in July is 9.8h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 6 in July leads to these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Wheaton, IL
- Average high temperature in July: 81.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in July: 65.3°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in July
Wheaton, 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
Wheaton, IL
- Average wind speed in July: 6.3mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in July
Wheaton, IL
- Average humidity in July: 78%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in July
Wheaton, IL
- Average rainfall in July: 3.7"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are November and December (1.65").
Average rainfall days in July
Wheaton, IL
- Average rainfall days in July: 20.1 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in July
Wheaton, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Wheaton, 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
Wheaton, 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: 9h and 48min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
Wheaton, IL
- Average sunshine days in July: 8.2 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is July (8.2 days).
Average UV index in July
Wheaton, 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 January (UV index 1).
Average cloud cover in July
Wheaton, IL
- Average cloud cover in July: 33
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in July
Wheaton, IL
- Average visibility in July: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
