July weather forecastDeKalb, IL
July
Weather in July
July is usually the hottest month in DeKalb, with temperatures reaching an annual high of up to 80.2°F (26.8°C). While the warmth predominates, the frequent rain showers offer balmy respite. The landscape is adorned with full-grown plants, offering a plethora of shades of green to admire. The month offers abundant sunlight, with a high UV index and extended daylight hours. All in all, July's weather encapsulates quintessential high-beam summer, interspersed with invigorating showers.Temperature
The month of July, characterized by an average high of 80.2°F (26.8°C) and a low of 63.1°F (17.3°C), is recognized as the warmest.Humidity
The months with the highest humidity are January and July, with an average relative humidity of 85%.Rainfall
In DeKalb, in July, during 18.1 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. Throughout the year, there are 152.6 rainfall days, and 32.09" (815mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in July is 14h and 52min.On the first day of the month, sunrise is at 5:23 am and sunset at 8:34 pm. On the last day of July, sunrise is at 5:48 am and sunset at 8:14 pm CDT.
Sunshine
The month with the most sunshine is July, with an average of 9.6h of sunshine.UV index
In July, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 5 in July converts into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
DeKalb, IL
- Average high temperature in July: 80.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in July: 63.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in July
DeKalb, 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
DeKalb, IL
- Average wind speed in July: 6.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in July
DeKalb, IL
- Average humidity in July: 85%
The months with the highest relative humidity are January and July (85%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in July
DeKalb, IL
- Average rainfall in July: 3.15"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in July
DeKalb, IL
- Average rainfall days in July: 18.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in July
DeKalb, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
DeKalb, 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
DeKalb, 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 36min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in July
DeKalb, IL
- Average sunshine days in July: 10.3 days
The month with the most sunshine days is November (17.2 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index in July
DeKalb, IL
- Average UV index in July: 5
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in July
DeKalb, IL
- Average cloud cover in July: 37
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in July
DeKalb, IL
- Average visibility in July: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
