World Resorts USA San Francisco Weather

San Francisco weather in December

Weather in San Francisco: December

Average day temperature: 54.3°F
Average night temperature: 50.1°F
Sea water temperature: 54.1°F
Number of sunny days: 14 days
Day length: 9.5 - 9.7 hours
Number of rainy days: 4 days
Precipitation totals: 2.2 in.

Air temperature in December, °F

Show year:
2023
2022
2021

The highest day temperature during December of 2023 was 59°F. At the same time the lowest night temperature was 47°F. Day and night temperature averages during December were 56.5°F and 53.4°F.

Sea water temperature in San Francisco in December, °F

Show year:
2023
2022
2021

The average sea water temperature in December of 2023 was 55.6°F. The highest and lowest sea temperatures during the month were 56.5°F and 54.3°F.

Sunny, partly cloudy and cloudy days

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

Precipitation total in December, in.

Precipitation total value in San Francisco in December is 1.9 in. Other months of the year show relatively similar values.

Wind speed in December, mph

The average wind speed value in December is 7.9 mph

Average sunny hours

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: 4.4.

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 54.3 °F
January 54.7 °F
February 55.6 °F
Rainiest months:
February 4 days
March 4 days
December 4 days
Windiest months:
May 10.0 mph
June 9.6 mph
April 9.5 mph

San Francisco on a weather map

San Francisco
+55°F
N 25 mph
Feels like: +52°F
Precip.: 0%
Places in USA:
Name
°F
+46°F
+43°F
+73°F
+73°F
+43°F
+57°F
+73°F
+64°F
+50°F
+52°F
+55°F
+68°F
+64°F
+52°F
+32°F
24 Hours Forecast
San Francisco
Local time: 03:36
November 21, thursday
0600
55°F
N
25 mph
0900
55°F
N
23 mph
1200
57°F
N
21 mph
1500
55°F
N
21 mph
1800
57°F
N
19 mph
2100
57°F
N
17 mph
November 22, friday
0000
57°F
N
17 mph
0300
57°F
N
23 mph
Units of measurement: °C / °F