Weather in San Sebastian: December
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Average day temperature: | 54.8°F |
| Average night temperature: | 46.5°F | |
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Sea water temperature: | 57.5°F |
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Number of sunny days: | 11 days |
| Day length: | 9.0 - 9.2 hours | |
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Number of rainy days: | 6 days |
| Precipitation totals: | 3.9 in. | |
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forecast
| San Sebastian |
temperature
| San Sebastian |
Air temperature in December, °F
The highest day temperature during December of 2023 was 63°F. At the same time the lowest night temperature was 37°F. Day and night temperature averages during December were 54.4°F and 46.7°F.
Sea water temperature in San Sebastian in December, °F
The average sea water temperature in December of 2023 was 59.1°F. The highest and lowest sea temperatures during the month were 60.8°F and 57.0°F.
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in San Sebastian in December is 4.2 in. Other months of the year show relatively similar values.
The average wind speed value in December is 7.7 mph It makes December one of the most 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: 4.5.
Best time for vacation in San Sebastian
San Sebastian on a weather map
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