Last updated: August 23, 2025
In December, the average temperature in Saint-Derrien, France is a brisk 9°C (48°F). You can expect minimums of 1°C (33°F) and maximums reaching 14°C (58°F). During this month, precipitation averages 127 mm (5.0 in) over 18 days, contributing to a notably high average humidity of 90%.
In December in Saint-Derrien, the average temperature is 9°C (48°F). The maximum can reach 14°C (58°F) and the minimum can be as low as 1°C (33°F). This makes it a great time to explore Saint-Derrien while enjoying cool but mild weather.
In Saint-Derrien in December, the precipitation amount is 127 mm (5.0 in) spread over 18 days.
In Saint-Derrien in December, humidity is 90%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration quite uncomfortable and requiring heavier layers to stay warm and dry.
In Saint-Derrien 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 Saint-Derrien, you can visit Hourly UV Index in Saint-Derrien.
UV Risk Categories
Weather in Saint-Derrien varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Derrien, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (45°F) | 74 mm (2.9 inches) | 89% | low |
| February Weather | 8°C (47°F) | 92 mm (3.6 inches) | 88% | moderate |
| March Weather | 9°C (48°F) | 76 mm (3.0 inches) | 85% | moderate |
| April Weather | 10°C (51°F) | 48 mm (1.9 inches) | 84% | high |
| May Weather | 13°C (55°F) | 67 mm (2.6 inches) | 81% | very high |
| June Weather | 16°C (60°F) | 86 mm (3.4 inches) | 77% | very high |
| July Weather | 17°C (64°F) | 47 mm (1.8 inches) | 63% | very high |
| August Weather | 17°C (62°F) | 58 mm (2.3 inches) | 71% | very high |
| September Weather | 15°C (60°F) | 51 mm (2.0 inches) | 76% | high |
| October Weather | 13°C (55°F) | 109 mm (4.3 inches) | 89% | moderate |
| November Weather | 10°C (50°F) | 88 mm (3.5 inches) | 90% | low |
| December Weather | 9°C (48°F) | 127 mm (5.0 inches) | 90% | low |