January weather forecast
Mount Vernon, WA

Weather in January

January is a frosty winter month in Mount Vernon, Washington, with an average temperature varying between 37°F (2.8°C) and 44.2°F (6.8°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a frosty 44.2°F (6.8°C). In Mount Vernon, in January, the average low-temperature is 37°F (2.8°C).

Humidity

January and February, with an average relative humidity of 83%, are the most humid months in Mount Vernon, Washington.

Rainfall

In Mount Vernon, in January, during 18.3 rainfall days, 4.13" (105mm) of precipitation is typically accumulated. Throughout the year, there are 185.2 rainfall days, and 34.72" (882mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Mount Vernon, Washington, are January through April, November and December. In Mount Vernon, snow falls for 2.2 days, with typically accumulated 2.2" (56mm) of snow. Throughout the year, in Mount Vernon, 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 January is 8h and 52min.
On the first day of January, sunrise is at 8:00 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:06 pm PST.

Sunshine

The average sunshine in January is 4h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the temperature in January in Mount Vernon?

In January, the average high-temperature is 44.2°F (6.8°C), and the average low-temperature is 37°F (2.8°C).

What is the most humid month in Mount Vernon?

January and February, with an average relative humidity of 83%, are most humid months.

What is the average humidity in January in Mount Vernon?

In Mount Vernon, Washington, the average relative humidity in January is 83%.

How much does it rain in Mount Vernon in January?

In Mount Vernon, during January, the rain falls for 18.3 days and regularly aggregates up to 4.13" (105mm) of precipitation.

How much does it snow in Mount Vernon in January?

In Mount Vernon, in January, during 2.2 snowfall days, 2.2" (56mm) of snow is typically accumulated.

What is the average length of the day in January in Mount Vernon?

In Mount Vernon, Washington, the average day length in January is 8h and 52min.

What time are sunrise and sunset in January in Mount Vernon?

On the first day of January, sunrise is at 8:00 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:06 pm PST.

How many hours of sunshine does Mount Vernon have in January?

The average sunshine duration in January in Mount Vernon is 4h.

What is the month with the lowest UV index in Mount Vernon?

The months with the lowest UV index in Mount Vernon, Washington, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Mount Vernon?

In Mount Vernon, Washington, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Mount Vernon, WA

Average temperature in January - Mount Vernon, WA
  • Average high temperature in January: 44.2°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 January: 37°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).

[Resources]

Average pressure in January
Mount Vernon, WA

Average pressure in January - Mount Vernon, WA
  • Average pressure in January: 30.09"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).

[Resources]

Average wind speed in January
Mount Vernon, WA

Average wind speed in January - Mount Vernon, WA
  • Average wind speed in January: 7mph

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).

[Resources]

Average humidity in January
Mount Vernon, WA

Average humidity in January - Mount Vernon, WA
  • Average humidity in January: 83%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is July (75%).

[Resources]

Average rainfall in January
Mount Vernon, WA

Average rainfall in January - Mount Vernon, WA
  • Average rainfall in January: 4.13"

The wettest month (with the highest rainfall) is November (4.96").
The driest month (with the least rainfall) is July (0.63").

[Resources]

Average rainfall days in January
Mount Vernon, WA

Average rainfall days in January - Mount Vernon, WA
  • Average rainfall days in January: 18.3 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).

[Resources]

Average snowfall in January
Mount Vernon, WA

Average snowfall in January - Mount Vernon, WA
  • Average snowfall in January: 2.2"

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").

[Resources]

Average snowfall days in January
Mount Vernon, WA

Average snowfall days in January - Mount Vernon, WA
  • Average snowfall days in January: 2.2 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).

[Resources]

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

Average daylight in January / Average sunshine in January - Mount Vernon, WA
  • Average daylight in January: 8h and 52min

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 January: 4h and 0min

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).

[Resources]

Average sunshine days in January
Mount Vernon, WA

Average sunshine days in January - Mount Vernon, WA
  • Average sunshine days in January: 11 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).

[Resources]

Average UV index in January
Mount Vernon, WA

Average UV index in January - Mount Vernon, WA
  • Average UV index in January: 2

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).

[Resources]

Average cloud cover in January
Mount Vernon, WA

Average cloud cover in January - Mount Vernon, WA
  • Average cloud cover in January: 58

The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).

[Resources]

Average visibility in January
Mount Vernon, WA

Average visibility in January - Mount Vernon, WA
  • Average visibility in January: 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location