Weather in Nantucket: December
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Average day temperature: | 42.9°F |
| Average night temperature: | 42.2°F | |
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Sea water temperature: | 45.1°F |
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Number of sunny days: | 8 days |
| Day length: | 9.2 - 9.4 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.3 in. | |
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temperature
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Air temperature in December, °F
| Day temperature | Night temperature |
The highest day temperature during December of 2024 was 51°F. At the same time the lowest night temperature was 23°F. Daily and nightly averages during December were 40.1°F and 39.2°F.
Sea water temperature in Nantucket in December, °F
The average sea water temperature in December of 2024 was 44.0°F. The highest and lowest sea temperatures during the month were 48.7°F and 41.0°F.
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| Partly cloudy days | |
| Cloudy days |
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 Nantucket in December is 1.3 in. Other months of the year show relatively similar values.
The average wind speed value in December is 18.4 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: 4.0.
Best time for vacation in Nantucket
Nantucket on a weather map
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