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 brings a rise in the average high-temperature, moving from a frosty 47.7°F (8.7°C) in March to a mild 59.5°F (15.3°C). During April, Viola sees a mean low-temperature of 42.8°F (6°C).Humidity
In Viola, the average relative humidity in April is 74%.Rainfall
In Viola, in April, during 13.6 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Viola, Illinois, during the entire year, the rain falls for 121.3 days and collects up to 17.72" (450mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Viola. April is the last month it regularly snows. During 0.6 snowfall days, in April, Viola aggregates 0.55" (14mm) of snow. Throughout the year, there are 26.3 snowfall days, and 7.64" (194mm) of snow is accumulated.Daylight
The average length of the day in April in Viola is 13h and 21min.On the first day of April in Viola, Illinois, sunrise is at 6:44 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:58 pm CDT.
Sunshine
In April, the average sunshine is 8h.UV index
In April, the average daily maximum UV index in Viola, Illinois, is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 4 during April translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Viola?
What is the average humidity in April in Viola?
How many days does it rain in April in Viola?
What is the last month it snows in Viola?
What is the average length of the day in April in Viola?
When is the sunrise / sunset in April in Viola?
How long on average sun shines in April in Viola?
What is the UV index reading in April in Viola?
Average temperature in April
Viola, IL
- Average high temperature in April: 59.5°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in April: 42.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in April
Viola, IL
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Viola, IL
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in April
Viola, IL
- Average humidity in April: 74%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Viola, IL
- Average rainfall in April: 1.93"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in April
Viola, IL
- Average rainfall days in April: 13.6 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in April
Viola, IL
- Average snowfall in April: 0.55"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Viola, IL
- Average snowfall days in April: 0.6 days
The month with the highest number of snowfall days is January (7.8 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
Viola, 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 18min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Viola, IL
- Average sunshine days in April: 15.8 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in April
Viola, IL
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in April
Viola, IL
- Average cloud cover in April: 46
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in April
Viola, IL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Viola, Illinois, USA
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