Weather in Boston: December
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Average day temperature: | 39.4°F |
| Average night temperature: | 33.9°F | |
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Sea water temperature: | 45.1°F |
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Number of sunny days: | 12 days |
| Day length: | 9.1 - 9.3 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 3.1 in. | |
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forecast
| Boston |
temperature
| Boston |
Air temperature in December, °F
| Day temperature | Night temperature |
The highest day temperature during December of 2024 was 55°F. At the same time the lowest night temperature was 12°F. Day and night temperature averages during December were 37.4°F and 30.7°F.
Sea water temperature in Boston in December, °F
The average sea water temperature in December of 2024 was 42.8°F. The highest and lowest sea temperatures during the month were 46.0°F and 39.4°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Boston in December is 3.2 in. Other months of the year show relatively similar values.
The average wind speed value in December is 9.5 mph
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: 4.7.
Best time for vacation in Boston
Boston on a weather map
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