Mount Vernon
Washington, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Mount Vernon, WA

December, the first month of the winter, in Mount Vernon, is still a chilly month, with average temperature ranging between max 46°F (7.8°C) and min 34.5°F (1.4°C).

Temperature

In Mount Vernon, the average high-temperature in December is relatively the same as in November - a chilly 46°F (7.8°C). In Mount Vernon, in December, the average low-temperature is 34.5°F (1.4°C).

Rainfall

During December, Mount Vernon regularly aggregates up to 4" (100.6mm) of precipitation. During the entire year, Mount Vernon aggregates up to 32.7" (830.7mm) of precipitation.

Daylight

With an average of 8.4h of daylight, December has the shortest days of the year.

What is the temperature in December in Mount Vernon?

The average high-temperature, in December, in Mount Vernon, is 46°F (7.8°C), while the average low-temperature is 34.5°F (1.4°C).

How much does it rain in Mount Vernon in December?

Throughout December, in Mount Vernon, 4" (100.6mm) of precipitation is accumulated.

What is the month with the shortest days in Mount Vernon?

December has the shortest days of the year in Mount Vernon, Washington, with an average of 8.4h of daylight.

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

The average length of the day in December is 8.4h.
Average temperature in December - Mount Vernon, WA
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is January (45.7°F).

  • Average low temperature in December: 34.6°F

The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is January (34.1°F).

Average rainfall in December - Mount Vernon, WA
  • Average rainfall in December: 4"

The wettest month (with the highest rainfall) is November (4.8").
The driest month (with the lowest rainfall) is July (1.2").

Average daylight in December - Mount Vernon, WA
  • Average daylight in December: 8.4h

The month with the longest days is June (Average daylight: 16h).
The month with shortest days is December (Average daylight: 8.4h).