Weather in Santa Monica: December
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Average day temperature: | 63.9°F |
| Average night temperature: | 54.0°F | |
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Sea water temperature: | 60.8°F |
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Number of sunny days: | 20 days |
| Day length: | 9.9 - 10.1 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 1.0 in. | |
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forecast
| Santa Monica |
temperature
| Santa Monica |
Air temperature in December, °F
The highest day temperature during December of 2025 was 80°F. At the same time the lowest night temperature was 47°F. Daily and nightly averages during December were 66.3°F and 54.9°F.
Sea water temperature in Santa Monica in December, °F
The average sea water temperature in December of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 64.4°F and 62.1°F.
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Santa Monica in December is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in December is 4.9 mph It makes December one of the least windy months of the year.
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: 6.4.
Best time for vacation in Santa Monica
Santa Monica on a weather map
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