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 transition into April is marked with an average high-temperature of a fresh 53.1°F (11.7°C), showing an insignificant shift from March's 48.2°F (9°C). The month of April records an average low-temperature of 41.9°F (5.5°C).Humidity
In April, the average relative humidity is 80%.Rainfall
In Mount Vernon, during April, the rain falls for 19.2 days and regularly aggregates up to 2.91" (74mm) of precipitation. Throughout the year, there are 185.2 rainfall days, and 34.72" (882mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.2 snowfall days, in April, Mount Vernon aggregates 0.16" (4mm) of snow. Throughout the year, there are 9.9 snowfall days, and 7.91" (201mm) of snow is accumulated.Daylight
In Mount Vernon, the average length of the day in April is 13h and 43min.On the first day of April, sunrise is at 6:45 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:22 pm PDT.
Sunshine
The average sunshine in April is 7.7h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: During April, 3 as the daily maximum UV index converts into the following advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Mount Vernon?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Mount Vernon have in April?
What is the UV index reading in April?
Average temperature in April
Mount Vernon, WA
- Average high temperature in April: 53.1°F
The warmest months (with the highest average high temperature) are July and August (68.4°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in April: 41.9°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is February (36.1°F).
Average pressure in April
Mount Vernon, WA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in April
Mount Vernon, WA
- Average wind speed in April: 6mph
The windiest month (with the highest average wind speed) is November (7.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in April
Mount Vernon, WA
- Average humidity in April: 80%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is July (75%).
Average rainfall in April
Mount Vernon, WA
- Average rainfall in April: 2.91"
The wettest month (with the highest rainfall) is November (4.96").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in April
Mount Vernon, WA
- Average rainfall days in April: 19.2 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in April
Mount Vernon, WA
- Average snowfall in April: 0.16"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Mount Vernon, WA
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Mount Vernon, WA
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in April: 7h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in April
Mount Vernon, WA
- Average sunshine days in April: 8.9 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.1 days).
Average UV index in April
Mount Vernon, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Mount Vernon, WA
- Average cloud cover in April: 52
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in April
Mount Vernon, WA
- 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).
Mount Vernon, Washington, USA
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