Last updated: March 2, 2024
The weather in Port Saint Lucie, United States, during December is characterized by an average temperature of 21°C (71°F). Highs can soar to 28°C (83°F), while lows may dip to 10°C (51°F). Typically, the humidity level in Port Saint Lucie throughout December hovers around 84%.
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Average temperature
Maximum temperature
Humidity
In December, Port Saint Lucie averages 49 mm (1.9 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 10 hours 26 minutes of daylight, with the sun shining for approximately 8 hours 51 minutes each day. Additionally, there is a 65% probability of sunny days during this period.
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Chance of sun
In December, the UV Index in Port Saint Lucie reaches a maximum of 5, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 2 | 3 | 5 | 5 | 5 | 4 | 3 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||