Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
With the advent of August, DeKalb experiences an average high-temperature of a still warm 78.4°F (25.8°C), mirroring a close resemblance to the previous month. DeKalb records an average temperature drop to a comfortable 61.2°F (16.2°C) in August.Humidity
In DeKalb, the average relative humidity in August is 84%.Rainfall
In DeKalb, during August, the rain falls for 15.8 days and regularly aggregates up to 2.72" (69mm) of precipitation. In DeKalb, during the entire year, the rain falls for 152.6 days and collects up to 32.09" (815mm) of precipitation.Snowfall
In DeKalb, snow does not fall in June through September.Daylight
In DeKalb, the average length of the day in August is 13h and 49min.On the first day of August, sunrise is at 5:49 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:29 pm CDT.
Sunshine
In DeKalb, Illinois, the average sunshine in August is 9.5h.UV index
June and August, with an average maximum UV index of 6, are months with the highest UV index in DeKalb. A UV Index estimate of 6 to 7 represents 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 August leads to these guidelines:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What is the usual temperature for DeKalb in August?
What is the average humidity in August in DeKalb?
How many days does it rain in August in DeKalb?
When it does not snow in DeKalb?
What is the average length of the day in August in DeKalb?
When are sunrise and sunset in August in DeKalb?
How long on average sun shines in August in DeKalb?
What is the month with the highest UV index in DeKalb?
What is the UV index reading in August in DeKalb?
Average temperature in August
DeKalb, IL
- Average high temperature in August: 78.4°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 August: 61.2°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 August
DeKalb, IL
- Average pressure in August: 29.98"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 August
DeKalb, IL
- Average wind speed in August: 6.2mph
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 August
DeKalb, IL
- Average humidity in August: 84%
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 August
DeKalb, IL
- Average rainfall in August: 2.72"
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 August
DeKalb, IL
- Average rainfall days in August: 15.8 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 August
DeKalb, IL
- Average snowfall in August: 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 August
DeKalb, IL
- Average snowfall days in August: 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 August /
Average sunshine in August
DeKalb, IL
- Average daylight in August: 13h 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 August: 9h and 3min
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 August
DeKalb, IL
- Average sunshine days in August: 12.9 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 August
DeKalb, IL
- Average UV index in August: 6
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 August
DeKalb, IL
- Average cloud cover in August: 35
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 August
DeKalb, IL
- Average visibility in August: 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).
DeKalb, Illinois, USA
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