April weather forecastArlington Heights, IL
April
Weather in April
April brings pleasant weather changes to Arlington Heights as it ushers in Spring. Weather transitions dramatically from frigidity to warmth with temperatures soaring up to a high of 54.7°F (12.6°C). Along with the warmer temperatures, rainfall jumps to its yearly peak of 3.46" (88mm) over 15.3 days. While daylight swells to 13.4 hours, the percentage of cloud cover declines, baring more sky for the climbing sun. Breezes retain winter's speed but bring in milder air, ensuring a beautiful spring.Temperature
An escalation in the average high-temperature is seen with the onset of April, moving from a frosty 43.9°F (6.6°C) in March to a fresh 54.7°F (12.6°C). An average temperature of 39.9°F (4.4°C) marks the nights in April.Humidity
The average relative humidity in April in Arlington Heights is 75%.Rainfall
The months with the most rainfall are April and May, with an average 3.46" (88mm) of precipitation.Snowfall
Months with snowfall in Arlington Heights are January through May, October through December. In Arlington Heights, during April, snow falls for 1.7 days and regularly aggregates up to 2.48" (63mm) of snow. Throughout the year, in Arlington Heights, there are 48.8 snowfall days, and 21.02" (534mm) of snow is accumulated.Daylight
In Arlington Heights, the average length of the day in April is 13h and 23min.On the first day of April in Arlington Heights, Illinois, sunrise is at 6:33 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 7:50 pm CDT.
Sunshine
The average sunshine in April is 7.5h.UV index
In April, the average daily maximum UV index in Arlington Heights is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: During April, 3 as the daily maximum UV index converts into the following advice:
Take precautions - Protection against sun damage is advised. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Arlington Heights, IL
- Average high temperature in April: 54.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in April: 39.9°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in April
Arlington Heights, 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
Arlington Heights, IL
- Average wind speed in April: 9.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in April
Arlington Heights, IL
- Average humidity in April: 75%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Arlington Heights, IL
- Average rainfall in April: 3.46"
The wettest months (with the highest rainfall) are April and May (3.46").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in April
Arlington Heights, IL
- Average rainfall days in April: 15.3 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in April
Arlington Heights, IL
- Average snowfall in April: 2.48"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Arlington Heights, IL
- Average snowfall days in April: 1.7 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 April /
Average sunshine in April
Arlington Heights, IL
- Average daylight in April: 13h and 24min
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 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Arlington Heights, IL
- Average sunshine days in April: 11.9 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in April
Arlington Heights, IL
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Arlington Heights, IL
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in April
Arlington Heights, 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).
