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December weather forecast in Mount Vernon

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

30 November, sun

	762 mmHg		86%
	6 m/s		+10

30 November, Sunday. day, 7°; night, 4°; rain

1 December, mon

	762 mmHg		87%
	5 m/s		+10

1 December, Monday. day, 7°; night, 4°; overcast

2 December, tue

	762 mmHg		87%
	5.4 m/s		+10

2 December, Tuesday. day, 7°; night, 4°; partly cloudy

3 December, wed

	764 mmHg		87%
	4.69 m/s		+10

3 December, Wednesday. day, 7°; night, 3°; clear

4 December, thu

	765 mmHg		84%
	4.8 m/s		+10

4 December, Thursday. day, 7°; night, 3°; clear

5 December, fri

	765 mmHg		86%
	4.3 m/s		+10

5 December, Friday. day, 6°; night, 3°; clear

6 December, sat

	763 mmHg		85%
	4.4 m/s		+10

6 December, Saturday. day, 6°; night, 3°; clear

7 December, sun

	763 mmHg		83%
	4.8 m/s		+10

7 December, Sunday. day, 7°; night, 4°; partly cloudy

8 December, mon

	764 mmHg		82%
	4.9 m/s		+10

8 December, Monday. day, 6°; night, 3°; partly cloudy

9 December, tue

	765 mmHg		84%
	4.9 m/s		+10

9 December, Tuesday. day, 6°; night, 3°; rain

10 December, wed

	762 mmHg		87%
	5.7 m/s		+10

10 December, Wednesday. day, 7°; night, 4°; rain

11 December, thu

	762 mmHg		87%
	5.7 m/s		+10

11 December, Thursday. day, 7°; night, 4°; rain

12 December, fri

	760 mmHg		86%
	6 m/s		+10

12 December, Friday. day, 7°; night, 4°; rain

13 December, sat

	760 mmHg		87%
	5.9 m/s		+9

13 December, Saturday. day, 7°; night, 4°; rain

14 December, sun

	761 mmHg		84%
	5.8 m/s		+9

14 December, Sunday. day, 7°; night, 4°; rain

15 December, mon

	762 mmHg		85%
	6.4 m/s		+9

15 December, Monday. day, 6°; night, 3°; rain

16 December, tue

	763 mmHg		84%
	5.7 m/s		+9

16 December, Tuesday. day, 7°; night, 4°; rain

17 December, wed

	763 mmHg		84%
	5.5 m/s		+9

17 December, Wednesday. day, 6°; night, 3°; overcast

18 December, thu

	762 mmHg		83%
	5.7 m/s		+9

18 December, Thursday. day, 6°; night, 4°; rain

19 December, fri

	763 mmHg		83%
	5.9 m/s		+9

19 December, Friday. day, 6°; night, 3°; rain

20 December, sat

	761 mmHg		84%
	6.2 m/s		+9

20 December, Saturday. day, 6°; night, 4°; rain

21 December, sun

	762 mmHg		85%
	5 m/s		+9

21 December, Sunday. day, 6°; night, 3°; rain

22 December, mon

	763 mmHg		85%
	4.9 m/s		+9

22 December, Monday. day, 6°; night, 3°; rain

23 December, tue

	764 mmHg		84%
	5 m/s		+9

23 December, Tuesday. day, 6°; night, 3°; partly cloudy

24 December, wed

	764 mmHg		86%
	5.1 m/s		+9

24 December, Wednesday. day, 6°; night, 3°; rain

25 December, thu

	763 mmHg		86%
	5.2 m/s		+9

25 December, Thursday. day, 6°; night, 3°; rain

26 December, fri

	762 mmHg		86%
	5.7 m/s		+9

26 December, Friday. day, 6°; night, 3°; partly cloudy

27 December, sat

	761 mmHg		87%
	5.6 m/s		+9

27 December, Saturday. day, 5°; night, 2°; rain

28 December, sun

	762 mmHg		88%
	5.1 m/s		+9

28 December, Sunday. day, 6°; night, 3°; rain

29 December, mon

	761 mmHg		87%
	4.9 m/s		+9

29 December, Monday. day, 6°; night, 3°; overcast

30 December, tue

	762 mmHg		85%
	5.4 m/s		+9

30 December, Tuesday. day, 6°; night, 3°; rain

31 December, wed

	763 mmHg		86%
	5 m/s		+9

31 December, Wednesday. day, 6°; night, 3°; rain

1 January, thu

	763 mmHg		85%
	5 m/s		+9

1 January, Thursday. day, 6°; night, 3°; overcast

2 January, fri

	761 mmHg		83%
	5.5 m/s		+8

2 January, Friday. day, 6°; night, 3°; rain

3 January, sat

	761 mmHg		83%
	5.4 m/s		+8

3 January, Saturday. day, 6°; night, 3°; rain

Average data for 10 years

Mount Vernon December

4

sunny days

19

days with precipitation

18

cloudy days

4 sunny days; 19 days with precipitation; 18 cloudy days;

85

%

air humidity

3.6

m/s

WindSE

190

mm of precipitation

(14% of annual average)

+9

°C

Water temperature

air humidity 85%; 190 millimeters of precipitation (14% of annual average); Wind south-easterly 3.6 Meters per second; Water temperature +9°

Weather graphs for December

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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SE

1

Average data for 10 years

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Daytime temperature

Night-time temperature

Cities near you

Vancouver
Seattle
Portland
Salem
Victoria
Vancouver
Mount Ranier National Park
Courtenay
Kelowna

Cities with similar weather in December

Gagra
Suhum
Baku
Pitsunda
Burgas
Varna
The Sunny Beach
Podgorica
Dublin

The weather forecast for December 2025 is based on historical data from the past 10 years.

December in Mount Vernon is the coldest month of the year. In December, the weather in Mount Vernon is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Mount Vernon has 18 rainy, 5 partly cloudy, 4 sunny, and 4 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Mount Vernon.

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