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
The start of April signals an increase in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in March to a refreshing 55.9°F (13.3°C). In April, the average low-temperature in Willowbrook records at a wintry 40.8°F (4.9°C) during the nights.Humidity
The average relative humidity in April in Willowbrook is 74%.Rainfall
In Willowbrook, during April, the rain falls for 17.6 days and regularly aggregates up to 3.66" (93mm) of precipitation. Throughout the year, there are 166.8 rainfall days, and 34.96" (888mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1.8 snowfall days, in April, Willowbrook aggregates 2.17" (55mm) of snow. Throughout the year, in Willowbrook, there are 47.1 snowfall days, and 19.02" (483mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 22min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:17 pm. On the last day of April, in Willowbrook, Illinois, sunrise is at 5:48 am and sunset at 7:49 pm CDT.
Sunshine
The average sunshine in April is 7.7h.UV index
In Willowbrook, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In April, a daily maximum UV index of 3 leads to the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Willowbrook in April?
What is the average humidity in April in Willowbrook?
How many days does it rain in April in Willowbrook?
What is the last month it snows in Willowbrook?
How many hours of daylight does Willowbrook have in April?
When are sunrise and sunset in April in Willowbrook?
How many hours of sunshine does Willowbrook have in April?
What is the UV index reading in April in Willowbrook?
Average temperature in April
Willowbrook, IL
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in April: 40.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in April
Willowbrook, 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
Willowbrook, IL
- Average wind speed in April: 9.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in April
Willowbrook, IL
- Average humidity in April: 74%
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 April
Willowbrook, IL
- Average rainfall in April: 3.66"
The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").
Average rainfall days in April
Willowbrook, IL
- Average rainfall days in April: 17.6 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in April
Willowbrook, IL
- Average snowfall in April: 2.17"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Willowbrook, IL
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Willowbrook, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Willowbrook, IL
- Average sunshine days in April: 9.5 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in April
Willowbrook, IL
- Average UV index in April: 3
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Willowbrook, IL
- Average cloud cover in April: 49
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 April
Willowbrook, IL
- Average visibility in April: 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).
Willowbrook, Illinois, USA
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