Weather in Fire Island: December
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Average day temperature: | 42.4°F |
| Average night temperature: | 37.8°F | |
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Sea water temperature: | 47.5°F |
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Number of sunny days: | 12 days |
| Day length: | 9.2 - 9.5 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.6 in. | |
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forecast
| Fire Island |
temperature
| Fire Island |
Air temperature in December, °F
The highest day temperature during December of 2025 was 54°F. At the same time the lowest night temperature was 14°F. Daily and nightly averages during December were 38.1°F and 30.1°F.
Sea water temperature in Fire Island in December, °F
The average sea water temperature in December of 2025 was 45.3°F. The highest and lowest sea temperatures during the month were 51.1°F and 41.7°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Fire Island in December is 1.6 in. Other months of the year show relatively similar values.
The average wind speed value in December is 11.4 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: 5.2.
Best time for vacation in Fire Island
Fire Island on a weather map
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