Weather in Port St. Lucie: December
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Average day temperature: | 73.5°F |
| Average night temperature: | 65.8°F | |
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Sea water temperature: | 74.2°F |
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Number of sunny days: | 13 days |
| Day length: | 10.4 - 10.6 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.5 in. | |
| more information | ||
forecast
| Port St. Lucie |
temperature
| Port St. Lucie |
Air temperature in December, °F
The highest day temperature during December of 2025 was 85°F. At the same time the lowest night temperature was 52°F. Daily and nightly averages during December were 77.6°F and 63.5°F.
Sea water temperature in Port St. Lucie in December, °F
The average sea water temperature in December of 2025 was 73.7°F. The highest and lowest sea temperatures during the month were 75.7°F and 70.7°F.
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Port St. Lucie in December is 0.5 in. Other months of the year show relatively similar values.
The average wind speed value in December is 10.2 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: 6.3.
Best time for vacation in Port St. Lucie
Port St. Lucie on a weather map
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