April weather forecastJoliet, IL
April
Weather in April
April is a distinct signal of spring's arrival in Joliet. Although March’s temperate climate extends into April, this month observes the onset of considerable rainfall - up to 3.62" (92mm). Longer daylight hours are enjoyed courtesy of the season, shrinking the prevalence of cloud cover. Warmer temperatures cause the humidity levels to dip slightly, but unpredictable wind patterns remain a significant factor in daily weather conditions.Temperature
With the onset of April, Joliet experiences a temperature shift, with the average high-temperature moving from a chilly 46.2°F (7.9°C) in March to a moderate 58.1°F (14.5°C). In April, Joliet records an average nighttime temperature of 41.7°F (5.4°C).Humidity
The average relative humidity in April is 75%.Rainfall
In April, the rain falls for 16.3 days. Throughout April, 3.62" (92mm) of precipitation is accumulated. Throughout the year, there are 153.6 rainfall days, and 32.72" (831mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 1 snowfall days, in April, Joliet aggregates 1.57" (40mm) of snow. Throughout the year, in Joliet, there are 38.2 snowfall days, and 14.61" (371mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 22min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:18 pm. On the last day of April, sunrise is at 5:49 am and sunset at 7:49 pm CDT.
Sunshine
In Joliet, the average sunshine in April is 7.5h.UV index
The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 3 during April, leads to the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Joliet, IL
- Average high temperature in April: 58.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in April
Joliet, IL
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Joliet, IL
- Average wind speed in April: 9.7mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in April
Joliet, IL
- Average humidity in April: 75%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Joliet, IL
- Average rainfall in April: 3.62"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in April
Joliet, IL
- Average rainfall days in April: 16.3 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in April
Joliet, IL
- Average snowfall in April: 1.57"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Joliet, IL
- Average snowfall days in April: 1 days
The month with the highest number of snowfall days is January (11.9 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
Joliet, IL
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in April
Joliet, IL
- Average sunshine days in April: 11.1 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in April
Joliet, IL
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Joliet, IL
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in April
Joliet, IL
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
