Last updated: June 24, 2025
In December, the average temperature in Naples, United States hovers around -1°C (30°F), with a chilling minimum of -21°C (-5°F) and a surprising maximum of 16°C (62°F). Expect 88 mm (3.5 in) of precipitation spread over about 15 days, creating a humid atmosphere with an average humidity of 87%. Stay prepared for the varied weather!
In December in Naples, the average temperature is -1°C (30°F), with maximums reaching 16°C (62°F) and minimums plummeting to -21°C (-5°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly for both mild and frigid conditions.
In Naples in December, the precipitation amount is 88 mm (3.5 in) over a span of 15 days.
In Naples in December, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.
In Naples in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Naples, you can visit Hourly UV Index in Naples.
UV Risk Categories
Weather in Naples varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Naples, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 75 mm (3.0 inches) | 91% | moderate |
| February Weather | -3°C (27°F) | 85 mm (3.4 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 76 mm (3.0 inches) | 88% | high |
| April Weather | 7°C (45°F) | 112 mm (4.4 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 126 mm (5.0 inches) | 82% | very high |
| June Weather | 19°C (66°F) | 106 mm (4.2 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 144 mm (5.7 inches) | 77% | very high |
| August Weather | 20°C (69°F) | 87 mm (3.4 inches) | 72% | very high |
| September Weather | 17°C (62°F) | 86 mm (3.4 inches) | 76% | very high |
| October Weather | 11°C (52°F) | 138 mm (5.4 inches) | 83% | high |
| November Weather | 3°C (37°F) | 84 mm (3.3 inches) | 88% | moderate |
| December Weather | -1°C (30°F) | 88 mm (3.5 inches) | 87% | low |