San Francisco Weather: December
 |
Average Day Temperature: | 54.8°F |
|
Average Night Temperature: | 50.0°F |
|
Sea Water Temperature: | 54.5°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 9.5 - 9.7 hours | |
|
Number of Rainy Days: | 4 days |
| Precipitation Totals: | 2.0 in | |
| detailed information | ||
forecast
| San Francisco |
Temperature
| San Francisco |
Air Temperature in December, °F
The highest day temperature in December 2025 was 63°F. The lowest night temperature was 42°F. The average values for day and night temperatures during December were 55.5°F и 47.7°F respectivly.
San Francisco Water Sea Temperature in December, °F
The average sea surface temperature in December 2025 for San Francisco was 55.3°F. The maximum and minimum values were 53.6°F and 57.8°F respectively.
Most of the days in December are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in December, in
Precipitation total in December for San Francisco is 2.0 in. It makes december one of the most rainy months of the year.
The average wind speed in December is 7.9 mph.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Francisco in December is 5.6 hours.
San Francisco on the Weather Map
| Chicago |  |
+56 |
| Hawaii |  |
+76 |
| Honolulu | |
+76 |
| Houston |  |
+72 |
| Las Vegas | |
+46 |
| Los Angeles | |
+54 |
| Maui | |
+70 |
| Miami | |
+72 |
| Miami Beach | |
+78 |
| New York | |
+32 |
| San Diego | |
+54 |
| San Francisco | |
+46 |
| Sarasota | |
+68 |
| Tampa | |
+68 |
| Washington | |
+40 |
| 0000 |  |
44°F | SW 6 mph |
| 0300 | |
44°F | SW 7 mph |
| 0600 |  |
44°F | SW 9 mph |
| 0900 | |
44°F | SW 9 mph |
| 1200 |  |
46°F | SW 10 mph |
| 1500 |  |
54°F | SW 7 mph |
| 1800 | |
54°F | SW 6 mph |
| 2100 | |
50°F | SW 7 mph |