Weather in Groton: December
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Average day temperature: | 41.7°F |
| Average night temperature: | 36.1°F | |
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Sea water temperature: | 48.9°F |
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Number of sunny days: | 11 days |
| Day length: | 9.2 - 9.4 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.5 in. | |
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forecast
| Groton |
temperature
| Groton |
Air temperature in December, °F
The highest day temperature during December of 2024 was 57°F. At the same time the lowest night temperature was 14°F. Daily and nightly averages during December were 39.7°F and 34.4°F.
Sea water temperature in Groton in December, °F
The average sea water temperature in December of 2024 was 48.2°F. The highest and lowest sea temperatures during the month were 52.9°F and 44.2°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Groton in December is 1.5 in. Other months of the year show relatively similar values.
The average wind speed value in December is 9.6 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: 4.9.
Best time for vacation in Groton
Groton on a weather map
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