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December weather forecast in San Ramon

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

	741 mmHg		57%
	3.9 m/s		+13

30 November, Sunday. day, 15°; night, 12°; partly cloudy

1 December, mon

	740 mmHg		62%
	4.1 m/s		+13

1 December, Monday. day, 14°; night, 11°; partly cloudy

2 December, tue

	739 mmHg		68%
	5.6 m/s		+13

2 December, Tuesday. day, 13°; night, 10°; partly cloudy

3 December, wed

	742 mmHg		57%
	3.7 m/s		+13

3 December, Wednesday. day, 13°; night, 10°; partly cloudy

4 December, thu

	741 mmHg		61%
	3.7 m/s		+13

4 December, Thursday. day, 13°; night, 11°; partly cloudy

5 December, fri

	743 mmHg		68%
	3.5 m/s		+13

5 December, Friday. day, 13°; night, 11°; rain

6 December, sat

	742 mmHg		68%
	3.2 m/s		+13

6 December, Saturday. day, 12°; night, 10°; partly cloudy

7 December, sun

	743 mmHg		64%
	3 m/s		+13

7 December, Sunday. day, 12°; night, 10°; clear

8 December, mon

	743 mmHg		68%
	2.9 m/s		+12

8 December, Monday. day, 12°; night, 11°; clear

9 December, tue

	742 mmHg		62%
	3.7 m/s		+12

9 December, Tuesday. day, 13°; night, 11°; partly cloudy

10 December, wed

	740 mmHg		69%
	3.7 m/s		+13

10 December, Wednesday. day, 13°; night, 11°; partly cloudy

11 December, thu

	740 mmHg		68%
	2.7 m/s		+13

11 December, Thursday. day, 12°; night, 10°; partly cloudy

12 December, fri

	740 mmHg		69%
	3.5 m/s		+13

12 December, Friday. day, 11°; night, 9°; rain

13 December, sat

	741 mmHg		73%
	3.5 m/s		+12

13 December, Saturday. day, 12°; night, 9°; partly cloudy

14 December, sun

	740 mmHg		74%
	4.8 m/s		+12

14 December, Sunday. day, 11°; night, 9°; overcast

15 December, mon

	739 mmHg		70%
	5 m/s		+12

15 December, Monday. day, 12°; night, 9°; clear

16 December, tue

	740 mmHg		69%
	4.5 m/s		+12

16 December, Tuesday. day, 11°; night, 10°; rain

17 December, wed

	740 mmHg		69%
	3.5 m/s		+12

17 December, Wednesday. day, 12°; night, 10°; partly cloudy

18 December, thu

	739 mmHg		68%
	4 m/s		+12

18 December, Thursday. day, 11°; night, 9°; clear

19 December, fri

	742 mmHg		63%
	4.6 m/s		+12

19 December, Friday. day, 11°; night, 9°; clear

20 December, sat

	741 mmHg		68%
	4.5 m/s		+12

20 December, Saturday. day, 12°; night, 10°; partly cloudy

21 December, sun

	741 mmHg		66%
	4.5 m/s		+12

21 December, Sunday. day, 12°; night, 10°; clear

22 December, mon

	742 mmHg		62%
	3.9 m/s		+12

22 December, Monday. day, 12°; night, 10°; clear

23 December, tue

	741 mmHg		64%
	5.1 m/s		+12

23 December, Tuesday. day, 11°; night, 9°; clear

24 December, wed

	741 mmHg		62%
	3.7 m/s		+12

24 December, Wednesday. day, 11°; night, 9°; partly cloudy

25 December, thu

	742 mmHg		63%
	4.3 m/s		+12

25 December, Thursday. day, 11°; night, 8°; clear

26 December, fri

	744 mmHg		67%
	3.2 m/s		+12

26 December, Friday. day, 10°; night, 8°; rain

27 December, sat

	743 mmHg		63%
	2.7 m/s		+12

27 December, Saturday. day, 11°; night, 10°; clear

28 December, sun

	742 mmHg		67%
	3.5 m/s		+12

28 December, Sunday. day, 12°; night, 9°; clear

29 December, mon

	742 mmHg		68%
	3.9 m/s		+12

29 December, Monday. day, 12°; night, 9°; rain

30 December, tue

	742 mmHg		68%
	3.2 m/s		+12

30 December, Tuesday. day, 11°; night, 8°; partly cloudy

31 December, wed

	742 mmHg		68%
	3.2 m/s		+12

31 December, Wednesday. day, 11°; night, 8°; clear

1 January, thu

	742 mmHg		63%
	3.2 m/s		+11

1 January, Thursday. day, 10°; night, 8°; clear

2 January, fri

	741 mmHg		67%
	3 m/s		+11

2 January, Friday. day, 11°; night, 8°; partly cloudy

3 January, sat

	741 mmHg		68%
	4.1 m/s		+11

3 January, Saturday. day, 11°; night, 9°; partly cloudy

Average data for 10 years

San Ramon December

12

sunny days

5

days with precipitation

14

cloudy days

12 sunny days; 5 days with precipitation; 14 cloudy days;

67

%

air humidity

2.5

m/s

WindSE

69

mm of precipitation

(18% of annual average)

+12

°C

Water temperature

air humidity 67%; 69 millimeters of precipitation (18% of annual average); Wind south-easterly 2.5 Meters per second; Water temperature +12°

Weather graphs for December

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

SE

NW

E

SE

SE

S

SE

SE

SE

S

SE

SW

SW

SE

SE

SE

S

S

SE

SE

SW

S

S

E

SE

S

SE

SE

NE

E

E

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

San Francisco
Sacramento
Oakland
San Jose
Cupertino
Santa Barbara
Reno
Monterey
South San Francisco

Cities with similar weather in December

Antalya
Kemer
Barcelona
Rome
Batumi
Athens
Budva
Heraklion
Nice

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

December in San Ramon is the coldest month of the year. In December, the weather in San Ramon is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, San Ramon has 13 partly cloudy, 12 sunny, 5 rainy, and 1 cloudy day in December. The rains are usually light. December as well as January and February is considered the most uncomfortable time to visit San Ramon.

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