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December weather forecast in Llanelli

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

	757 mmHg		85%
	8.1 m/s		+12

30 November, Sunday. day, 9°; night, 5°; partly cloudy

1 December, mon

	757 mmHg		85%
	7.7 m/s		+12

1 December, Monday. day, 8°; night, 5°; clear

2 December, tue

	757 mmHg		83%
	7.7 m/s		+12

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

3 December, wed

	755 mmHg		85%
	8.1 m/s		+12

3 December, Wednesday. day, 8°; night, 5°; rain

4 December, thu

	755 mmHg		84%
	8 m/s		+12

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

5 December, fri

	756 mmHg		84%
	8.5 m/s		+12

5 December, Friday. day, 8°; night, 4°; partly cloudy

6 December, sat

	758 mmHg		85%
	8.1 m/s		+11

6 December, Saturday. day, 8°; night, 5°; partly cloudy

7 December, sun

	756 mmHg		84%
	9.1 m/s		+11

7 December, Sunday. day, 8°; night, 5°; rain

8 December, mon

	756 mmHg		83%
	8.89 m/s		+11

8 December, Monday. day, 8°; night, 5°; rain

9 December, tue

	759 mmHg		83%
	8.39 m/s		+11

9 December, Tuesday. day, 8°; night, 5°; clear

10 December, wed

	759 mmHg		83%
	8.1 m/s		+11

10 December, Wednesday. day, 8°; night, 5°; partly cloudy

11 December, thu

	758 mmHg		85%
	7.3 m/s		+11

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

12 December, fri

	758 mmHg		85%
	8.7 m/s		+11

12 December, Friday. day, 8°; night, 4°; rain

13 December, sat

	757 mmHg		85%
	8.2 m/s		+11

13 December, Saturday. day, 7°; night, 5°; overcast

14 December, sun

	758 mmHg		85%
	8.1 m/s		+11

14 December, Sunday. day, 7°; night, 5°; partly cloudy

15 December, mon

	759 mmHg		86%
	7.8 m/s		+11

15 December, Monday. day, 8°; night, 5°; partly cloudy

16 December, tue

	760 mmHg		85%
	7.8 m/s		+11

16 December, Tuesday. day, 8°; night, 4°; rain

17 December, wed

	759 mmHg		86%
	7.9 m/s		+11

17 December, Wednesday. day, 7°; night, 4°; partly cloudy

18 December, thu

	758 mmHg		88%
	8.39 m/s		+11

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

19 December, fri

	757 mmHg		87%
	7.7 m/s		+11

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

20 December, sat

	758 mmHg		86%
	7.5 m/s		+11

20 December, Saturday. day, 7°; night, 4°; partly cloudy

21 December, sun

	757 mmHg		88%
	8.3 m/s		+10

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

22 December, mon

	757 mmHg		87%
	8 m/s		+10

22 December, Monday. day, 8°; night, 6°; overcast

23 December, tue

	757 mmHg		87%
	8.8 m/s		+10

23 December, Tuesday. day, 8°; night, 6°; rain

24 December, wed

	756 mmHg		86%
	8.7 m/s		+10

24 December, Wednesday. day, 8°; night, 5°; rain

25 December, thu

	756 mmHg		87%
	8.3 m/s		+10

25 December, Thursday. day, 7°; night, 5°; rain

26 December, fri

	756 mmHg		85%
	8.8 m/s		+10

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

27 December, sat

	754 mmHg		86%
	8.6 m/s		+10

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

28 December, sun

	755 mmHg		85%
	8.39 m/s		+10

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

29 December, mon

	756 mmHg		86%
	8.6 m/s		+10

29 December, Monday. day, 7°; night, 4°; rain

30 December, tue

	755 mmHg		88%
	8.6 m/s		+10

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

31 December, wed

	755 mmHg		87%
	9.1 m/s		+10

31 December, Wednesday. day, 8°; night, 5°; rain

1 January, thu

	755 mmHg		86%
	9 m/s		+10

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

2 January, fri

	757 mmHg		84%
	8.3 m/s		+10

2 January, Friday. day, 7°; night, 4°; partly cloudy

3 January, sat

	757 mmHg		84%
	9 m/s		+10

3 January, Saturday. day, 7°; night, 4°; rain

Average data for 10 years

Llanelli December

3

sunny days

18

days with precipitation

13

cloudy days

3 sunny days; 18 days with precipitation; 13 cloudy days;

85

%

air humidity

6.1

m/s

WindS

152

mm of precipitation

(11% of annual average)

+11

°C

Water temperature

air humidity 85%; 152 millimeters of precipitation (11% of annual average); Wind southerly 6.1 Meters per second; Water temperature +11°

Weather graphs for December

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

S

S

S

SW

SW

S

S

SW

SW

S

S

S

S

S

S

SW

S

S

S

S

S

SW

S

S

S

SW

S

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
Manchester
Brest
Liverpool
Trowbridge
Oxford
Bournemouth
Wicklow
Plymouth

Cities with similar weather in December

Gagra
Suhum
Baku
Pitsunda
Burgas
New Athos
The Sunny Beach
Podgorica
Vancouver

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

December in Llanelli is the windiest month of the year. In December, the weather in Llanelli is typically cold. Average daily high temperature in December is about 8 degrees above zero. On average, Llanelli has 18 rainy, 8 partly cloudy, 3 sunny, and 2 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 Llanelli.

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