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December weather forecast in San Francisco

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		77%
	4.5 m/s		+13

30 November, Sunday. day, 15°; night, 8°; rain

1 December, mon

	760 mmHg		78%
	4.8 m/s		+13

1 December, Monday. day, 15°; night, 8°; rain

2 December, tue

	760 mmHg		77%
	4.69 m/s		+13

2 December, Tuesday. day, 15°; night, 8°; clear

3 December, wed

	761 mmHg		77%
	4.5 m/s		+13

3 December, Wednesday. day, 14°; night, 8°; clear

4 December, thu

	761 mmHg		78%
	4.1 m/s		+13

4 December, Thursday. day, 14°; night, 8°; clear

5 December, fri

	761 mmHg		79%
	4.1 m/s		+13

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

6 December, sat

	760 mmHg		80%
	4.6 m/s		+13

6 December, Saturday. day, 14°; night, 8°; rain

7 December, sun

	760 mmHg		81%
	4.69 m/s		+13

7 December, Sunday. day, 14°; night, 8°; clear

8 December, mon

	761 mmHg		80%
	4.3 m/s		+12

8 December, Monday. day, 14°; night, 7°; partly cloudy

9 December, tue

	762 mmHg		78%
	4.4 m/s		+12

9 December, Tuesday. day, 14°; night, 8°; partly cloudy

10 December, wed

	761 mmHg		77%
	5 m/s		+13

10 December, Wednesday. day, 14°; night, 8°; clear

11 December, thu

	761 mmHg		79%
	4.6 m/s		+13

11 December, Thursday. day, 14°; night, 7°; partly cloudy

12 December, fri

	760 mmHg		83%
	4.6 m/s		+13

12 December, Friday. day, 13°; night, 8°; rain

13 December, sat

	760 mmHg		84%
	4.8 m/s		+12

13 December, Saturday. day, 13°; night, 8°; rain

14 December, sun

	761 mmHg		82%
	5.6 m/s		+12

14 December, Sunday. day, 13°; night, 8°; rain

15 December, mon

	762 mmHg		79%
	4.69 m/s		+12

15 December, Monday. day, 13°; night, 7°; rain

16 December, tue

	761 mmHg		77%
	4.8 m/s		+12

16 December, Tuesday. day, 13°; night, 7°; partly cloudy

17 December, wed

	761 mmHg		76%
	4.6 m/s		+12

17 December, Wednesday. day, 13°; night, 7°; partly cloudy

18 December, thu

	761 mmHg		78%
	4.4 m/s		+12

18 December, Thursday. day, 14°; night, 7°; clear

19 December, fri

	761 mmHg		80%
	4.6 m/s		+12

19 December, Friday. day, 13°; night, 7°; partly cloudy

20 December, sat

	761 mmHg		80%
	4.4 m/s		+12

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

21 December, sun

	760 mmHg		80%
	4.69 m/s		+12

21 December, Sunday. day, 13°; night, 8°; rain

22 December, mon

	760 mmHg		77%
	5 m/s		+12

22 December, Monday. day, 13°; night, 8°; rain

23 December, tue

	762 mmHg		76%
	4.1 m/s		+12

23 December, Tuesday. day, 13°; night, 7°; clear

24 December, wed

	762 mmHg		78%
	4.6 m/s		+12

24 December, Wednesday. day, 13°; night, 7°; partly cloudy

25 December, thu

	761 mmHg		76%
	4.8 m/s		+12

25 December, Thursday. day, 13°; night, 6°; clear

26 December, fri

	761 mmHg		76%
	5.2 m/s		+12

26 December, Friday. day, 13°; night, 7°; clear

27 December, sat

	762 mmHg		79%
	4.9 m/s		+12

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

28 December, sun

	762 mmHg		80%
	4.19 m/s		+12

28 December, Sunday. day, 13°; night, 7°; rain

29 December, mon

	760 mmHg		81%
	4.8 m/s		+12

29 December, Monday. day, 13°; night, 7°; rain

30 December, tue

	760 mmHg		83%
	4.8 m/s		+12

30 December, Tuesday. day, 13°; night, 7°; rain

31 December, wed

	760 mmHg		80%
	5 m/s		+12

31 December, Wednesday. day, 13°; night, 7°; partly cloudy

1 January, thu

	760 mmHg		77%
	5 m/s		+11

1 January, Thursday. day, 13°; night, 7°; clear

2 January, fri

	760 mmHg		79%
	4.4 m/s		+11

2 January, Friday. day, 13°; night, 7°; rain

3 January, sat

	760 mmHg		81%
	4.6 m/s		+11

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

Average data for 10 years

San Francisco December

9

sunny days

11

days with precipitation

10

cloudy days

9 sunny days; 11 days with precipitation; 10 cloudy days;

79

%

air humidity

2.9

m/s

WindS

121

mm of precipitation

(20% of annual average)

+12

°C

Water temperature

air humidity 79%; 121 millimeters of precipitation (20% of annual average); Wind southerly 2.9 Meters per second; Water temperature +12°

Weather graphs for December

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

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S

S

S

S

S

S

S

S

S

S

S

S

SW

S

S

SE

S

S

S

S

S

S

S

S

S

S

S

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

Sacramento
Oakland
Redding
Monterey
San Jose
Reno
Stanford
San Luis Obispo
Cupertino

Cities with similar weather in December

Antalya
Barcelona
Rome
Marmaris
Athens
Lisbon
Heraklion
Hammamet
Nice

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

December in San Francisco is the rainiest and the coldest month of the year. In December, the weather in San Francisco is typically warm. Average daily high temperature in December is about 13 degrees above zero. On average, San Francisco has 11 rainy, 9 sunny, 8 partly cloudy, and 3 cloudy days in December. The rains are usually heavy. December as well as January is considered the most uncomfortable time to visit San Francisco.

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