World Resorts USA San Francisco Weather

San Francisco weather in December

Weather in San Francisco: December

Average day temperature: 54.2°F
Average night temperature: 50.2°F
Sea water temperature: 54.0°F
Number of sunny days: 13 days
Day length: 9.5 - 9.7 hours
Number of rainy days: 4 days
Precipitation totals: 2.0 in.

Air temperature in December, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
10
20
30
40
50
60
70
80
Day temperature   
Night temperature

The highest day temperature during December of 2024 was 60°F. At the same time the lowest night temperature was 44°F. Day and night temperature averages during December were 54.0°F and 51.3°F.

Sea water temperature in San Francisco in December, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
47
49
51
53
55
57
59
61

The average sea water temperature in December of 2024 was 53.6°F. The highest and lowest sea temperatures during the month were 54.7°F and 52.0°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
39%
26%
35%

Number of sunny, partly cloudy and cloudy days in December is almost equal.

Precipitation total in December, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.5
1.0
1.5
1.9
2.4
2.9
3.4
3.9
1.1
1.1
2.1
2.3
2.8
1.6
1.1
1.1
2.1
2.3
2.8

Precipitation total value in San Francisco in December is 1.6 in. Other months of the year show relatively similar values.

Wind speed in December, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.6
3.3
4.9
6.6
8.2
9.8
11.5
6.9
7.0
7.6
8.2
8.9
9.6
9.5
9.2
8.9
8.5
7.8
7.7
6.9
7.0
7.6
8.2
8.9
9.6
9.5
9.2
8.9
8.5
7.8

The average wind speed value in December is 7.7 mph It makes December one of the least windy months of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.9
3.8
5.7
7.6
9.5
11.5
13.4
15.3
6.7
6.2
7.0
9.4
8.7
10.8
11.1
10.0
7.4
6.5
5.9
4.3
6.7
6.2
7.0
9.4
8.7
10.8
11.1
10.0
7.4
6.5
5.9

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.3.

Best time for vacation in San Francisco

Sunniest months:
June 19 days
September 18 days
October 18 days
Warmest months:
August 65.9 °F
September 65.0 °F
October 63.9 °F
Warmest sea temp:
September 61.8 °F
August 61.6 °F
October 60.4 °F
Coldest months:
December 54.2 °F
January 54.6 °F
February 55.4 °F
Rainiest months:
March 4 days
December 4 days
January 4 days
Windiest months:
May 10.0 mph
June 9.6 mph
April 9.5 mph

San Francisco on a weather map

Leaflet | Tiles © Esri
Places in USA:
Name
°F
+48°F
+59°F
+79°F
+79°F
+70°F
+81°F
+75°F
+55°F
+77°F
+86°F
+63°F
+70°F
+73°F
+66°F
+45°F
24 Hours Forecast
San Francisco
Local time: 13:55
February 27, thursday
1500
63°F
SW
11 mph
1800
66°F
SW
7 mph
2100
57°F
E
5 mph
February 28, friday
0000
54°F
S
4 mph
0300
52°F
SW
3 mph
0600
50°F
SW
5 mph
0900
50°F
W
2 mph
1200
50°F
N
1 mph
Units of measurement: °C / °F