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
As April arrives, a rise in the average high-temperature is observed, moving from a chilly 44.2°F (6.8°C) in March to a fresh 54.9°F (12.7°C). Riverdale observes an average nighttime temperature of 41.4°F (5.2°C) during April.Humidity
In April, the average relative humidity is 76%.Rainfall
In Riverdale, during April, the rain falls for 11.7 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Riverdale, during the entire year, the rain falls for 110.3 days and collects up to 10.31" (262mm) of precipitation.Snowfall
Months with snowfall in Riverdale are January through April, October through December. April is the last month it regularly snows. During 1.4 snowfall days, in April, Riverdale aggregates 0.47" (12mm) of snow. In Riverdale, during the entire year, snow falls for 34.1 days and aggregates up to 4.13" (105mm) of snow.Daylight
In April, the average length of the day in Riverdale is 13h and 22min.On the first day of April in Riverdale, Illinois, sunrise is at 6:31 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 7:47 pm CDT.
Sunshine
In April, the average sunshine in Riverdale is 7.6h.UV index
In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In April, the maximum UV index of 3 suggests these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Minimize direct exposure to the Sun during midday when its radiation is at its peak. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What are the temperatures in Riverdale in April?
What is the average humidity in April in Riverdale?
How much does it rain in Riverdale in April?
What is the last month it snows in Riverdale?
How many hours of daylight does Riverdale have in April?
What time are sunrise and sunset in April in Riverdale?
How many hours of sunshine does Riverdale have in April?
What is the UV index reading in April in Riverdale?
Average temperature in April
Riverdale, IL
- Average high temperature in April: 54.9°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in April
Riverdale, 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
Riverdale, IL
- Average wind speed in April: 10.3mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in April
Riverdale, IL
- Average humidity in April: 76%
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
Riverdale, IL
- Average rainfall in April: 1.1"
The wettest months (with the highest rainfall) are May and June (1.38").
The driest months (with the least rainfall) are February and December (0.47").
Average rainfall days in April
Riverdale, IL
- Average rainfall days in April: 11.7 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in April
Riverdale, IL
- Average snowfall in April: 0.47"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Riverdale, IL
- Average snowfall days in April: 1.4 days
The month with the highest number of snowfall days is January (9.3 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
Riverdale, IL
- Average daylight in April: 13h and 2min
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 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in April
Riverdale, IL
- Average sunshine days in April: 15.2 days
The month with the most sunshine days is December (19.8 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in April
Riverdale, 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
Riverdale, IL
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in April
Riverdale, 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).
Riverdale, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
