Weather in Groton: March
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Average day temperature: | 46.4°F |
| Average night temperature: | 36.7°F | |
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Sea water temperature: | 41.4°F |
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Number of sunny days: | 10 days |
| Day length: | 11.3 - 12.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.3 in. | |
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forecast
| Groton |
temperature
| Groton |
Air temperature in March, °F
| Day temperature | Night temperature |
The highest day temperature during March of 2025 was 59°F. At the same time the lowest night temperature was 18°F. Daily and nightly averages during March were 48.1°F and 37.7°F.
Sea water temperature in Groton in March, °F
The average sea water temperature in March of 2025 was 40.1°F. The highest and lowest sea temperatures during the month were 42.8°F and 37.8°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Number of sunny, partly cloudy and cloudy days in March is almost equal.
Precipitation total in March, in.
Precipitation total value in Groton in March is 1.3 in. Other months of the year show relatively similar values.
The average wind speed value in March is 10.0 mph It makes March 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 March is: 6.3.
Best time for vacation in Groton
Groton on a weather map
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