Weather in Jacksonville: December
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Average day temperature: | 66.8°F |
| Average night temperature: | 57.0°F | |
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Sea water temperature: | 63.2°F |
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Number of sunny days: | 11 days |
| Day length: | 10.2 - 10.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.7 in. | |
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forecast
| Jacksonville |
temperature
| Jacksonville |
Air temperature in December, °F
The highest day temperature during December of 2025 was 78°F. At the same time the lowest night temperature was 32°F. Daily and nightly averages during December were 66.1°F and 52.2°F.
Sea water temperature in Jacksonville in December, °F
The average sea water temperature in December of 2025 was 62.1°F. The highest and lowest sea temperatures during the month were 66.7°F and 58.6°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Jacksonville in December is 2.1 in. Other months of the year show relatively similar values.
The average wind speed value in December is 6.5 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: 5.6.
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Jacksonville on a weather map
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