Last updated: August 23, 2025
In December, the average temperature in La Seyne-sur-Mer, France hovers around 11°C (53°F). Expect a minimum of 3°C (38°F) and a pleasant maximum of 17°C (63°F). During this period, anticipate about 75 mm (2.9 in) of precipitation over 8 days, accompanied by an average humidity of 79%. Enjoy the mild weather while staying prepared for occasional rain!
In December in La Seyne-sur-Mer, the average temperature is 11°C (53°F). Maximums can reach 17°C (63°F), while minimums can drop as low as 3°C (38°F). This makes La Seyne-sur-Mer a cool but pleasant destination for travelers looking to enjoy mild weather.
In La Seyne-sur-Mer in December, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.
In La Seyne-sur-Mer in December, humidity is 79%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make traveling uncomfortable, as the cool air clings to your skin and dampens your clothes, leaving you seeking shelter and a warm drink more often than not.
In La Seyne-sur-Mer 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 La Seyne-sur-Mer, you can visit Hourly UV Index in La Seyne-sur-Mer.
UV Risk Categories
Weather in La Seyne-sur-Mer varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in La Seyne-sur-Mer, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (51°F) | 53 mm (2.1 inches) | 80% | low |
| February Weather | 11°C (52°F) | 44 mm (1.7 inches) | 73% | moderate |
| March Weather | 12°C (54°F) | 49 mm (1.9 inches) | 71% | moderate |
| April Weather | 14°C (57°F) | 69 mm (2.7 inches) | 75% | high |
| May Weather | 17°C (63°F) | 48 mm (1.9 inches) | 74% | very high |
| June Weather | 22°C (71°F) | 19 mm (0.7 inches) | 72% | very high |
| July Weather | 24°C (76°F) | 8 mm (0.3 inches) | 69% | very high |
| August Weather | 25°C (77°F) | 13 mm (0.5 inches) | 66% | very high |
| September Weather | 22°C (72°F) | 40 mm (1.6 inches) | 71% | high |
| October Weather | 18°C (65°F) | 85 mm (3.3 inches) | 78% | moderate |
| November Weather | 14°C (58°F) | 124 mm (4.9 inches) | 82% | moderate |
| December Weather | 11°C (53°F) | 75 mm (2.9 inches) | 79% | low |