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December weather forecast in Petaluma

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		76%
	3.1 m/s		+13

30 November, Sunday. day, 15°; night, 5°; partly cloudy

1 December, mon

	757 mmHg		78%
	3.3 m/s		+14

1 December, Monday. day, 15°; night, 6°; rain

2 December, tue

	758 mmHg		75%
	3.3 m/s		+13

2 December, Tuesday. day, 15°; night, 5°; clear

3 December, wed

	758 mmHg		75%
	3.1 m/s		+13

3 December, Wednesday. day, 15°; night, 6°; clear

4 December, thu

	758 mmHg		78%
	2.8 m/s		+12

4 December, Thursday. day, 15°; night, 5°; partly cloudy

5 December, fri

	758 mmHg		78%
	2.8 m/s		+13

5 December, Friday. day, 15°; night, 6°; overcast

6 December, sat

	758 mmHg		80%
	3 m/s		+12

6 December, Saturday. day, 15°; night, 6°; rain

7 December, sun

	758 mmHg		80%
	3.2 m/s		+12

7 December, Sunday. day, 14°; night, 5°; rain

8 December, mon

	758 mmHg		80%
	2.8 m/s		+12

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

9 December, tue

	759 mmHg		80%
	2.8 m/s		+13

9 December, Tuesday. day, 14°; night, 5°; clear

10 December, wed

	759 mmHg		78%
	3.2 m/s		+13

10 December, Wednesday. day, 14°; night, 5°; partly cloudy

11 December, thu

	758 mmHg		79%
	3.1 m/s		+12

11 December, Thursday. day, 14°; night, 5°; partly cloudy

12 December, fri

	757 mmHg		83%
	2.9 m/s		+12

12 December, Friday. day, 13°; night, 6°; rain

13 December, sat

	758 mmHg		83%
	3.2 m/s		+12

13 December, Saturday. day, 13°; night, 6°; rain

14 December, sun

	758 mmHg		82%
	3.7 m/s		+12

14 December, Sunday. day, 13°; night, 5°; rain

15 December, mon

	759 mmHg		80%
	3.2 m/s		+12

15 December, Monday. day, 13°; night, 4°; partly cloudy

16 December, tue

	758 mmHg		77%
	3.1 m/s		+12

16 December, Tuesday. day, 13°; night, 4°; partly cloudy

17 December, wed

	758 mmHg		77%
	2.9 m/s		+12

17 December, Wednesday. day, 13°; night, 5°; partly cloudy

18 December, thu

	758 mmHg		79%
	2.9 m/s		+11

18 December, Thursday. day, 13°; night, 4°; clear

19 December, fri

	758 mmHg		78%
	3.2 m/s		+11

19 December, Friday. day, 13°; night, 5°; clear

20 December, sat

	758 mmHg		79%
	3.1 m/s		+12

20 December, Saturday. day, 13°; night, 4°; overcast

21 December, sun

	757 mmHg		80%
	3.2 m/s		+12

21 December, Sunday. day, 13°; night, 5°; rain

22 December, mon

	757 mmHg		77%
	3.5 m/s		+12

22 December, Monday. day, 13°; night, 6°; rain

23 December, tue

	759 mmHg		77%
	2.8 m/s		+12

23 December, Tuesday. day, 13°; night, 4°; clear

24 December, wed

	759 mmHg		79%
	3.1 m/s		+11

24 December, Wednesday. day, 13°; night, 4°; overcast

25 December, thu

	759 mmHg		76%
	3.1 m/s		+11

25 December, Thursday. day, 13°; night, 4°; clear

26 December, fri

	758 mmHg		78%
	3.3 m/s		+11

26 December, Friday. day, 13°; night, 4°; clear

27 December, sat

	759 mmHg		80%
	3.2 m/s		+11

27 December, Saturday. day, 13°; night, 4°; overcast

28 December, sun

	759 mmHg		81%
	2.9 m/s		+11

28 December, Sunday. day, 13°; night, 4°; rain

29 December, mon

	757 mmHg		83%
	3.2 m/s		+11

29 December, Monday. day, 13°; night, 4°; rain

30 December, tue

	757 mmHg		82%
	3.3 m/s		+11

30 December, Tuesday. day, 13°; night, 5°; rain

31 December, wed

	757 mmHg		78%
	3.4 m/s		+11

31 December, Wednesday. day, 13°; night, 5°; clear

1 January, thu

	757 mmHg		78%
	3.4 m/s		+11

1 January, Thursday. day, 13°; night, 4°; clear

2 January, fri

	757 mmHg		80%
	2.9 m/s		+11

2 January, Friday. day, 13°; night, 4°; rain

3 January, sat

	758 mmHg		81%
	3 m/s		+11

3 January, Saturday. day, 13°; night, 4°; rain

Average data for 10 years

Petaluma December

9

sunny days

11

days with precipitation

11

cloudy days

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

79

%

air humidity

1.9

m/s

WindSE

158

mm of precipitation

(21% of annual average)

+12

°C

Water temperature

air humidity 79%; 158 millimeters of precipitation (21% of annual average); Wind south-easterly 1.9 Meters per second; Water temperature +12°

Weather graphs for December

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

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SE

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SE

SE

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SE

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SE

SE

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SE

S

S

S

SE

SE

SE

SE

SE

SE

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SE

SE

SE

S

S

SE

SE

S

S

1

Average data for 10 years

2

3

4

5

6

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9

10

11

12

13

14

15

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18

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31

Daytime temperature

Night-time temperature

Cities near you

San Francisco
Sacramento
San Jose
Washington
Oakland
Monterey
Palo Alto
Fremont
Santa Cruz

Cities with similar weather in December

Antalya
Kemer
Barcelona
Rome
Athens
Heraklion
Nice
Salou
Fethiye

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

December in Petaluma is the cloudiest and the coldest month of the year. In December, the weather in Petaluma is typically warm. Average daily high temperature in December is about 14 degrees above zero. On average, Petaluma has 11 rainy, 9 sunny, 6 partly cloudy, and 5 cloudy days in December. The rains are usually heavy. December as well as January is considered the most uncomfortable time to visit Petaluma.

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