April weather forecastRiverside, IL
April
Weather in April
April is a fresh spring month in Riverside, Illinois, with an average temperature varying between 40.8°F (4.9°C) and 53.8°F (12.1°C).Temperature
The start of April signals an increase in the average high-temperature, moving from a frosty 43.7°F (6.5°C) in March to a cool 53.8°F (12.1°C). During April, Riverside witnesses a consistent average low-temperature of 40.8°F (4.9°C).Humidity
In Riverside, the average relative humidity in April is 75%.Rainfall
In Riverside, during April, the rain falls for 10.5 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Riverside, during the entire year, the rain falls for 92 days and collects up to 7.4" (188mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. During 1.3 snowfall days, in April, Riverside aggregates 0.59" (15mm) of snow. Throughout the year, there are 26.5 snowfall days, and 4.06" (103mm) of snow is accumulated.Daylight
In Riverside, Illinois, the average length of the day in April is 13h and 23min.On the first day of April, sunrise is at 6:32 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 7:49 pm CDT.
Sunshine
In Riverside, the average sunshine in April is 7.8h.UV index
In April, the average daily maximum UV index in Riverside is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in April converts into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Riverside, IL
- Average high temperature in April: 53.8°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in April: 40.8°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in April
Riverside, 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
Riverside, IL
- Average wind speed in April: 10.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in April
Riverside, 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 (72%).
Average rainfall in April
Riverside, IL
- Average rainfall in April: 0.75"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are February, March, November and December (0.39").
Average rainfall days in April
Riverside, IL
- Average rainfall days in April: 10.5 days
The month with the highest number of rainy days is June (11.7 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in April
Riverside, IL
- Average snowfall in April: 0.59"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Riverside, IL
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is February (7.3 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
Riverside, 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 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in April
Riverside, IL
- Average sunshine days in April: 16.3 days
The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in April
Riverside, IL
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Riverside, IL
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
Riverside, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
