Half Moon Bay in december: average Weather, Temperature and Climate
Weather in Half Moon Bay in december 2026
The weather in Half Moon Bay in december comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
tolerable weather
Weather at 6am
52°F
Clear/Sunny
49% of time
23%
15%
8%
Weather at 12pm
58°F
Clear/Sunny
49% of time
20%
13%
13%
Weather at 6pm
56°F
Clear/Sunny
50% of time
21%
13%
10%
Weather at 3am
54°F
49%
24%
18%
7%
Evolution of daily average temperature and precipitation in Half Moon Bay in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Half Moon Bay in december.
The climate of Half Moon Bay in december is tolerable
The weather in december in Half Moon Bay is relatively dry (with 2.8in of rainfall over 4 days). The weather's not getting better compared to the previous month since in november there is an average of 2in of rainfall over 3 days.
The climate is fairly cool in that locality this month, but it is bearable by dressing hot. The thermometer averaged maximum of 58°F. The minimum is 52°F. Thus, the mean temperature average on this month of december in Half Moon Bay is 56°F. These temperatures are far removed from those records observed in Half Moon Bay in december with a maximum record of 72°F in 2021 and a minimum record of 36°F in 2009.
On average, in Half Moon Bay, the days of december last 09:36. Sunrise is at 07:17 and sunset is at 16:53.
With proper weather, december is okay (but not the best) to go in Half Moon Bay in California.
Half Moon Bay: another month?
If you can push the dates of your trip to Half Moon Bay forward, the month of january has a better weather forecast than december. more information
December: another location in California?
If you want to go to California in december, there are destinations with better weather than Half Moon Bay:
In december, Los Angeles , San Diego, Channel Islands National Park, Encinitas, Hollywood and Joshua Tree National Park have good weather.
Seasonal average climate and temperature of Half Moon Bay in december
Check below seasonal norms These statistics are compiled from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 56°F | ||||
| Highest temperature | 58°F | ||||
| Lowest temperature | 52°F | ||||
| Highest record temperature | 72°F (2021) | ||||
| Lowest record temperature | 36°F (2009) | ||||
| Number of days at +65°F | 1 day(s) (3%) | ||||
| Sea temperature | |||||
| Average sea temperature | 55°F | ||||
| Lowest sea temperature | 53°F | ||||
| Highest sea temperature | 57°F | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 49°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.8in | ||||
| Number of days with rainfall | 4 day(s) (14%) | ||||
| Record daily rainfall | 2.5in (2016) | ||||
| Other climate data | |||||
| Humidity | 76% | ||||
| Visibility | 9.52km | ||||
| Cloud cover | 35% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 8 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:17 | ||||
| Time of sunset | 16:53 | ||||
| Length of day | 09:36 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last december?
Here is the day by day recorded weather in Half Moon Bay in december 2025:
45°F to 59°F
43°F to 56°F
47°F to 59°F
45°F to 59°F
47°F to 56°F
52°F to 56°F
49°F to 52°F
47°F to 52°F
50°F to 52°F
47°F to 58°F
45°F to 58°F
43°F to 59°F
47°F to 58°F
49°F to 52°F
47°F to 54°F
56°F to 58°F
56°F to 59°F
47°F to 56°F
56°F to 56°F
56°F to 58°F
58°F to 59°F
56°F to 58°F
56°F to 59°F
56°F to 59°F
56°F to 58°F
56°F to 58°F
49°F to 52°F
43°F to 54°F
38°F to 56°F
45°F to 59°F
52°F to 54°F
Map: other cities in California in december
Cities near Half Moon Bay:
| Moss Beach in december | tolerable weather |
| Pescadero in december | tolerable weather |
| Silicon Valley in december | tolerable weather |
| San Francisco in december | tolerable weather |
| Oakland in december | tolerable weather |
| Golden Gate National Recreation Area in december | tolerable weather |
| San Jose in december | tolerable weather |
| Stinson Beach in december | tolerable weather |
| Santa Cruz California in december | tolerable weather |
| Point Reyes in december | tolerable weather |
| Pacific Grove in december | tolerable weather |
| Napa Valley in december | very bad weather |
Click over cities on the map for information about the weather in december.
Half Moon Bay
perfect weather
good
tolerable
bad
very bad
Weather data for Half Moon Bay in december:
Weather data for Half Moon Bay for december are derived from an average of the weather forecast since 2009 in Half Moon Bay. There is a margin of error and these forecasts are to be considered as general information only. The weather in Half Moon Bay can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Half Moon Bay.