Weather in Edgartown: December
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Average day temperature: | 42.4°F |
| Average night temperature: | 39.2°F | |
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Sea water temperature: | 45.9°F |
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Number of sunny days: | 12 days |
| Day length: | 9.2 - 9.4 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
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forecast
| Edgartown |
temperature
| Edgartown |
Air temperature in December, °F
The highest day temperature during December of 2025 was 55°F. At the same time the lowest night temperature was 16°F. Daily and nightly averages during December were 38.3°F and 31.4°F.
Sea water temperature in Edgartown in December, °F
The average sea water temperature in December of 2025 was 44.7°F. The highest and lowest sea temperatures during the month were 49.3°F and 40.1°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Edgartown in December is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in December is 14.5 mph It makes December most windy month 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: 5.1.
Best time for vacation in Edgartown
Edgartown on a weather map
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