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December weather forecast in Portsmouth

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

	756 mmHg		89%
	6.2 m/s		+10

30 November, Sunday. day, 8°; night, 3°; overcast

1 December, mon

	756 mmHg		88%
	6.4 m/s		+10

1 December, Monday. day, 8°; night, 3°; rain

2 December, tue

	756 mmHg		88%
	6.1 m/s		+11

2 December, Tuesday. day, 7°; night, 4°; overcast

3 December, wed

	754 mmHg		88%
	6.5 m/s		+11

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

4 December, thu

	754 mmHg		87%
	6.4 m/s		+11

4 December, Thursday. day, 8°; night, 3°; rain

5 December, fri

	756 mmHg		87%
	6.6 m/s		+11

5 December, Friday. day, 8°; night, 3°; partly cloudy

6 December, sat

	758 mmHg		88%
	6.2 m/s		+11

6 December, Saturday. day, 7°; night, 3°; partly cloudy

7 December, sun

	756 mmHg		87%
	6.7 m/s		+11

7 December, Sunday. day, 8°; night, 3°; rain

8 December, mon

	756 mmHg		87%
	6.5 m/s		+11

8 December, Monday. day, 8°; night, 3°; rain

9 December, tue

	758 mmHg		87%
	5.9 m/s		+11

9 December, Tuesday. day, 8°; night, 3°; clear

10 December, wed

	759 mmHg		88%
	6.2 m/s		+10

10 December, Wednesday. day, 7°; night, 2°; clear

11 December, thu

	758 mmHg		91%
	5.7 m/s		+10

11 December, Thursday. day, 7°; night, 2°; partly cloudy

12 December, fri

	758 mmHg		90%
	6.6 m/s		+10

12 December, Friday. day, 8°; night, 2°; overcast

13 December, sat

	757 mmHg		88%
	6.3 m/s		+10

13 December, Saturday. day, 7°; night, 3°; overcast

14 December, sun

	757 mmHg		87%
	6 m/s		+10

14 December, Sunday. day, 7°; night, 3°; partly cloudy

15 December, mon

	759 mmHg		88%
	6 m/s		+10

15 December, Monday. day, 7°; night, 3°; partly cloudy

16 December, tue

	759 mmHg		89%
	5.4 m/s		+10

16 December, Tuesday. day, 7°; night, 3°; overcast

17 December, wed

	759 mmHg		89%
	5.6 m/s		+10

17 December, Wednesday. day, 7°; night, 2°; partly cloudy

18 December, thu

	758 mmHg		91%
	6.1 m/s		+10

18 December, Thursday. day, 7°; night, 3°; rain

19 December, fri

	757 mmHg		91%
	5.7 m/s		+10

19 December, Friday. day, 7°; night, 2°; partly cloudy

20 December, sat

	758 mmHg		90%
	5.9 m/s		+10

20 December, Saturday. day, 7°; night, 2°; rain

21 December, sun

	757 mmHg		91%
	6.2 m/s		+10

21 December, Sunday. day, 8°; night, 4°; overcast

22 December, mon

	757 mmHg		90%
	6.5 m/s		+10

22 December, Monday. day, 8°; night, 4°; overcast

23 December, tue

	757 mmHg		89%
	6.8 m/s		+10

23 December, Tuesday. day, 9°; night, 4°; rain

24 December, wed

	756 mmHg		88%
	7.1 m/s		+10

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

25 December, thu

	756 mmHg		89%
	6.6 m/s		+10

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

26 December, fri

	756 mmHg		88%
	6.7 m/s		+10

26 December, Friday. day, 7°; night, 3°; partly cloudy

27 December, sat

	754 mmHg		88%
	7.1 m/s		+10

27 December, Saturday. day, 7°; night, 3°; rain

28 December, sun

	755 mmHg		87%
	6.2 m/s		+10

28 December, Sunday. day, 6°; night, 2°; clear

29 December, mon

	756 mmHg		89%
	6.3 m/s		+10

29 December, Monday. day, 7°; night, 2°; rain

30 December, tue

	756 mmHg		91%
	6.6 m/s		+10

30 December, Tuesday. day, 8°; night, 3°; rain

31 December, wed

	756 mmHg		90%
	6.8 m/s		+10

31 December, Wednesday. day, 7°; night, 4°; overcast

1 January, thu

	755 mmHg		89%
	6.9 m/s		+9

1 January, Thursday. day, 7°; night, 3°; rain

2 January, fri

	756 mmHg		87%
	6.9 m/s		+9

2 January, Friday. day, 7°; night, 3°; clear

3 January, sat

	757 mmHg		87%
	7.1 m/s		+9

3 January, Saturday. day, 7°; night, 2°; rain

Average data for 10 years

Portsmouth December

3

sunny days

12

days with precipitation

14

cloudy days

3 sunny days; 12 days with precipitation; 14 cloudy days;

89

%

air humidity

4.6

m/s

WindS

75

mm of precipitation

(10% of annual average)

+10

°C

Water temperature

air humidity 89%; 75 millimeters of precipitation (10% of annual average); Wind southerly 4.6 Meters per second; Water temperature +10°

Weather graphs for December

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

S

S

S

SW

SW

S

S

SW

SW

SW

S

S

S

S

S

SW

S

S

S

S

S

SW

S

SW

SW

SW

S

SW

SW

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

Paris
London
Manchester
Liverpool
Trowbridge
Looe
Bristol
Plymouth
Nantes

Cities with similar weather in December

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

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

In December, the weather in Portsmouth is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Portsmouth has 11 rainy, 9 partly cloudy, 8 cloudy, and 3 sunny days in December. The rains are usually moderate. December as well as January, February, March, and April is considered the most uncomfortable time to visit Portsmouth.

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