Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April's arrival coincides with a temperature rise, moving from March's chilly 44.6°F (7°C) to a mild 56.7°F (13.7°C). During April, DeKalb's temperature falls to a steady low-temperature average of 39.9°F (4.4°C).Humidity
The months with the lowest humidity are April and October, with an average relative humidity of 75%.Rainfall
In DeKalb, in April, it is raining for 16.4 days, with typically 3.86" (98mm) of accumulated precipitation. In DeKalb, during the entire year, the rain falls for 152.6 days and collects up to 32.09" (815mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In DeKalb, in April, snow falls for 1.7 days, with typically accumulated 1.34" (34mm) of snow. In DeKalb, during the entire year, snow falls for 44.3 days and aggregates up to 17.87" (454mm) of snow.Daylight
The average length of the day in April is 13h and 23min.On the first day of April, sunrise is at 6:36 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 7:53 pm CDT.
Sunshine
In April, the average sunshine is 7.4h.UV index
In April, the average daily maximum UV index in DeKalb is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 3 in April interprets into the following advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What are the least humid months?
What is the average humidity in April?
How many days does it rain in April?
How many days does it snow in April?
How many hours of daylight does DeKalb have in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index intensity in April?
Average temperature in April
DeKalb, IL
- Average high temperature in April: 56.7°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 April: 39.9°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 April
DeKalb, IL
- Average pressure in April: 29.95"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 April
DeKalb, IL
- Average wind speed in April: 10mph
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 April
DeKalb, IL
- Average humidity in April: 75%
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 April
DeKalb, IL
- Average rainfall in April: 3.86"
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 April
DeKalb, IL
- Average rainfall days in April: 16.4 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 April
DeKalb, IL
- Average snowfall in April: 1.34"
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 April
DeKalb, IL
- Average snowfall days in April: 1.7 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 April /
Average sunshine in April
DeKalb, IL
- Average daylight in April: 13h and 2min
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 April: 7h and 2min
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 April
DeKalb, IL
- Average sunshine days in April: 10.8 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 April
DeKalb, IL
- Average UV index in April: 3
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 April
DeKalb, IL
- Average cloud cover in April: 51
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 April
DeKalb, IL
- Average visibility in April: 6mi
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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