April weather forecast
Mount Vernon, WA

Weather in April

April is a cool spring month in Mount Vernon, Washington, with an average temperature fluctuating between 41.9°F (5.5°C) and 53.1°F (11.7°C).

Temperature

In Mount Vernon, the average high-temperature in April is almost the same as in March - a fresh 53.1°F (11.7°C). In Mount Vernon, the average low-temperature is 41.9°F (5.5°C).

Humidity

The average relative humidity in April in Mount Vernon is 80%.

Rainfall

In Mount Vernon, Washington, during 19.2 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Mount Vernon, Washington, during the entire year, the rain falls for 185.2 days and collects up to 34.72" (882mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.2 snowfall days, in April, Mount Vernon aggregates 0.16" (4mm) of snow. In Mount Vernon, Washington, during the entire year, snow falls for 9.9 days and aggregates up to 7.91" (201mm) of snow.

Daylight

The average length of the day in April is 13h and 43min.
On the first day of April, sunrise is at 6:46 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:21 pm PDT.

Sunshine

The average sunshine in April in Mount Vernon is 7.7h.

UV index

The average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in April in Mount Vernon?

In April, the average high-temperature is 53.1°F (11.7°C), and the average low-temperature is 41.9°F (5.5°C).

What is the average humidity in April in Mount Vernon?

In Mount Vernon, Washington, the average relative humidity in April is 80%.

How much does it rain in Mount Vernon in April?

In April, in Mount Vernon, Washington, the rain falls for 19.2 days. Throughout April, 2.91" (74mm) of precipitation is accumulated.

What is the last month it snows in Mount Vernon?

April is the last month it regularly snows in Mount Vernon. During 0.2 snowfall days, in April, Mount Vernon aggregates 0.16" (4mm) of snow.

How many hours of daylight does Mount Vernon have in April?

In Mount Vernon, the average day length in April is 13h and 43min.

When are sunrise and sunset in April in Mount Vernon?

On the first day of April in Mount Vernon, sunrise is at 6:46 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:21 pm PDT.

How long on average sun shines in April in Mount Vernon?

In April, the average sunshine duration is 7.7h.

What is the UV index reading in April in Mount Vernon?

In Mount Vernon, Washington, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Mount Vernon, WA

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).

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Average pressure in April
Mount Vernon, WA

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).

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Average wind speed in April
Mount Vernon, WA

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).

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Average humidity in April
Mount Vernon, WA

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%).

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Average rainfall in April
Mount Vernon, WA

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").

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Average rainfall days in April
Mount Vernon, WA

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).

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Average snowfall in April
Mount Vernon, WA

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").

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Average snowfall days in April
Mount Vernon, WA

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).

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Average daylight in April /
Average sunshine in April
Mount Vernon, WA

Average daylight in April / Average sunshine in April - Mount Vernon, WA
  • Average daylight in April: 13h and 43min

The month with the longest days is June (Average daylight: 16h and 2min).
The month with the shortest days is December (Average daylight: 8h and 23min).

  • Average sunshine in April: 7h and 42min

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).

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Average sunshine days in April
Mount Vernon, WA

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).

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Average UV index in April
Mount Vernon, WA

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).

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Average cloud cover in April
Mount Vernon, WA

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).

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Average visibility in April
Mount Vernon, WA

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).

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