Weather in Kauai: December
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Average day temperature: | 75.8°F |
| Average night temperature: | 71.6°F | |
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Sea water temperature: | 77.6°F |
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Number of sunny days: | 5 days |
| Day length: | 10.8 - 10.9 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 1.0 in. | |
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forecast
| Kauai |
temperature
| Kauai |
Air temperature in December, °F
The highest day temperature during December of 2025 was 80°F. At the same time the lowest night temperature was 66°F. Daily and nightly averages during December were 76.8°F and 70.8°F.
Sea water temperature in Kauai in December, °F
The average sea water temperature in December of 2025 was 78.2°F. The highest and lowest sea temperatures during the month were 79.3°F and 77.5°F.
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Kauai in December is 1.0 in. Other months of the year show relatively similar values.
The average wind speed value in December is 8.8 mph It makes December one of the least 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 December is: 4.6.
Best time for vacation in Kauai
Kauai on a weather map
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