Weather in Terceira Island: December
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Average day temperature: | 61.9°F |
| Average night temperature: | 59.8°F | |
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Sea water temperature: | 63.1°F |
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Number of sunny days: | 5 days |
| Day length: | 9.5 - 9.7 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 3.3 in. | |
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forecast
| Terceira Island |
temperature
| Terceira Island |
Air temperature in December, °F
The highest day temperature during December of 2025 was 64°F. At the same time the lowest night temperature was 51°F. Daily and nightly averages during December were 59.6°F and 57.5°F.
Sea water temperature in Terceira Island 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 64.9°F and 61.5°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 Terceira Island in December is 3.1 in. Other months of the year show relatively similar values.
The average wind speed value in December is 15.8 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: 3.6.
Best time for vacation in Terceira Island
Terceira Island on a weather map
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