Weather in Cambridge: December
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Average day temperature: | 39.3°F |
| Average night temperature: | 32.9°F | |
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Sea water temperature: | 43.5°F |
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Number of sunny days: | 13 days |
| Day length: | 9.1 - 9.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.3 in. | |
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forecast
| Cambridge |
temperature
| Cambridge |
Air temperature in December, °F
The highest day temperature during December of 2025 was 57°F. At the same time the lowest night temperature was 8°F. Daily and nightly averages during December were 35.6°F and 26.3°F.
Sea water temperature in Cambridge in December, °F
The average sea water temperature in December of 2025 was 42.6°F. The highest and lowest sea temperatures during the month were 44.2°F and 40.6°F.
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Cambridge in December is 1.3 in. Other months of the year show relatively similar values.
The average wind speed value in December is 8.5 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: 5.1.
Best time for vacation in Cambridge
Cambridge on a weather map
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