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December weather forecast in Caernarfon

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

	760 mmHg		82%
	8.39 m/s		+11

30 November, Sunday. day, 9°; night, 6°; overcast

1 December, mon

	759 mmHg		82%
	8.3 m/s		+11

1 December, Monday. day, 9°; night, 5°; partly cloudy

2 December, tue

	760 mmHg		81%
	8.1 m/s		+11

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

3 December, wed

	757 mmHg		82%
	8.5 m/s		+11

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

4 December, thu

	758 mmHg		81%
	8.6 m/s		+11

4 December, Thursday. day, 8°; night, 6°; rain

5 December, fri

	759 mmHg		81%
	9.39 m/s		+11

5 December, Friday. day, 9°; night, 5°; rain

6 December, sat

	760 mmHg		83%
	8.5 m/s		+11

6 December, Saturday. day, 9°; night, 5°; partly cloudy

7 December, sun

	758 mmHg		81%
	9.7 m/s		+11

7 December, Sunday. day, 9°; night, 6°; rain

8 December, mon

	758 mmHg		80%
	9.5 m/s		+11

8 December, Monday. day, 9°; night, 6°; rain

9 December, tue

	761 mmHg		80%
	8.8 m/s		+11

9 December, Tuesday. day, 9°; night, 6°; clear

10 December, wed

	761 mmHg		81%
	8.5 m/s		+11

10 December, Wednesday. day, 9°; night, 6°; clear

11 December, thu

	761 mmHg		82%
	7.3 m/s		+11

11 December, Thursday. day, 8°; night, 5°; partly cloudy

12 December, fri

	760 mmHg		84%
	7.9 m/s		+11

12 December, Friday. day, 8°; night, 5°; rain

13 December, sat

	760 mmHg		82%
	8 m/s		+10

13 December, Saturday. day, 8°; night, 5°; overcast

14 December, sun

	760 mmHg		81%
	8.5 m/s		+10

14 December, Sunday. day, 8°; night, 5°; overcast

15 December, mon

	762 mmHg		81%
	7.6 m/s		+10

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

16 December, tue

	762 mmHg		82%
	8.5 m/s		+10

16 December, Tuesday. day, 8°; night, 5°; rain

17 December, wed

	762 mmHg		82%
	8.2 m/s		+10

17 December, Wednesday. day, 8°; night, 5°; clear

18 December, thu

	761 mmHg		85%
	7.8 m/s		+10

18 December, Thursday. day, 8°; night, 5°; rain

19 December, fri

	760 mmHg		83%
	7.8 m/s		+10

19 December, Friday. day, 8°; night, 5°; rain

20 December, sat

	760 mmHg		83%
	7.7 m/s		+10

20 December, Saturday. day, 7°; night, 5°; rain

21 December, sun

	760 mmHg		83%
	8.2 m/s		+10

21 December, Sunday. day, 8°; night, 5°; overcast

22 December, mon

	759 mmHg		83%
	8.1 m/s		+10

22 December, Monday. day, 9°; night, 6°; overcast

23 December, tue

	759 mmHg		84%
	9.3 m/s		+10

23 December, Tuesday. day, 9°; night, 6°; overcast

24 December, wed

	758 mmHg		83%
	9.2 m/s		+10

24 December, Wednesday. day, 9°; night, 6°; rain

25 December, thu

	758 mmHg		84%
	8.3 m/s		+10

25 December, Thursday. day, 8°; night, 5°; overcast

26 December, fri

	758 mmHg		83%
	9.1 m/s		+10

26 December, Friday. day, 8°; night, 5°; rain

27 December, sat

	756 mmHg		84%
	8.7 m/s		+10

27 December, Saturday. day, 7°; night, 5°; rain

28 December, sun

	757 mmHg		82%
	8.2 m/s		+10

28 December, Sunday. day, 7°; night, 4°; clear

29 December, mon

	758 mmHg		82%
	9 m/s		+10

29 December, Monday. day, 8°; night, 4°; rain

30 December, tue

	757 mmHg		85%
	9.1 m/s		+10

30 December, Tuesday. day, 8°; night, 5°; rain

31 December, wed

	757 mmHg		83%
	9.39 m/s		+10

31 December, Wednesday. day, 8°; night, 6°; rain

1 January, thu

	757 mmHg		83%
	9.2 m/s		+10

1 January, Thursday. day, 8°; night, 5°; rain

2 January, fri

	759 mmHg		80%
	8.39 m/s		+10

2 January, Friday. day, 7°; night, 5°; partly cloudy

3 January, sat

	759 mmHg		80%
	9.2 m/s		+10

3 January, Saturday. day, 7°; night, 5°; rain

Average data for 10 years

Caernarfon December

4

sunny days

17

days with precipitation

13

cloudy days

4 sunny days; 17 days with precipitation; 13 cloudy days;

82

%

air humidity

6.2

m/s

WindS

109

mm of precipitation

(11% of annual average)

+10

°C

Water temperature

air humidity 82%; 109 millimeters of precipitation (11% of annual average); Wind southerly 6.2 Meters per second; Water temperature +10°

Weather graphs for December

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

S

S

SW

SW

SW

S

S

SW

SW

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

S

S

S

SW

SW

S

S

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Dublin
Edinburgh
Manchester
Liverpool
Trowbridge
Oxford
Glasgow
Bournemouth
Wicklow

Cities with similar weather in December

Gagra
Suhum
Baku
Pitsunda
Burgas
Varna
The Sunny Beach
Podgorica
Vancouver

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

In December, the weather in Caernarfon is typically cold. Average daily high temperature in December is about 8 degrees above zero. On average, Caernarfon has 17 rainy, 6 cloudy, 4 sunny, and 4 partly 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 Caernarfon.

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