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, Viola's weather shows an increase in high-temperatures, moving from March's frosty 44.6°F (7°C) to a moderate 56.8°F (13.8°C). An average low-temperature of 40.6°F (4.8°C) is noted during the nights in April.Humidity
The average relative humidity in April in Viola is 75%.Rainfall
In April, the rain falls for 15.5 days. Throughout April, 3.03" (77mm) of precipitation is accumulated. Throughout the year, in Viola, there are 137.5 rainfall days, and 27.68" (703mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Viola. April is the last month it regularly snows in Viola. During 1.3 snowfall days, in April, Viola aggregates 0.75" (19mm) of snow. In Viola, Iowa, during the entire year, snow falls for 38.8 days and aggregates up to 15.16" (385mm) of snow.Daylight
The average length of the day in April is 13h and 23min.On the first day of April, sunrise is at 6:46 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:03 pm CDT.
Sunshine
In April, the average sunshine is 7.5h.UV index
The average daily maximum UV index in April in Viola, Iowa, is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 3 in April suggests the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Viola?
What is the average humidity in April in Viola?
How much does it rain in Viola in April?
What is the last month it snows in Viola?
How many hours of daylight does Viola have in April?
When are sunrise and 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, IA
- Average high temperature in April: 56.8°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 (25.5°F).
- Average low temperature in April: 40.6°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in April
Viola, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Viola, IA
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in April
Viola, IA
- Average humidity in April: 75%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Viola, IA
- Average rainfall in April: 3.03"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in April
Viola, IA
- Average rainfall days in April: 15.5 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in April
Viola, IA
- Average snowfall in April: 0.75"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Viola, IA
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Viola, IA
- Average daylight in April: 13h and 2min
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 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in April
Viola, IA
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in April
Viola, IA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Viola, IA
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Viola, IA
- 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, Iowa, USA
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