Weather in Grand Isle: December
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Average day temperature: | 63.2°F |
| Average night temperature: | 60.6°F | |
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Sea water temperature: | 66.0°F |
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Number of sunny days: | 9 days |
| Day length: | 10.3 - 10.4 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 0.9 in. | |
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forecast
| Grand Isle |
temperature
| Grand Isle |
Air temperature in December, °F
The highest day temperature during December of 2023 was 70°F. At the same time the lowest night temperature was 45°F. Day and night temperature averages during December were 61.1°F and 59.2°F.
Sea water temperature in Grand Isle in December, °F
The average sea water temperature in December of 2023 was 65.0°F. The highest and lowest sea temperatures during the month were 68.4°F and 61.7°F.
Mostly all days in December are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Grand Isle in December is 0.9 in. Other months of the year show relatively similar values.
The average wind speed value in December is 11.7 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: 5.7.
Best time for vacation in Grand Isle
Grand Isle on a weather map
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