Last updated: August 27, 2025
In Saint-Martin, Switzerland, the average temperature in December hovers around -8°C (18°F). However, temperatures can vary dramatically, with a minimum plunge of -30°C (-22°F) and a maximum reaching up to 7°C (45°F). Expect a significant amount of precipitation, averaging 188 mm (7.4 in) over 16 days, contributing to a notably high average humidity level of 91%.
In December in Saint-Martin, the average temperature is -8°C (18°F). The maximum can reach 7°C (45°F), and the minimum can be as low as -30°C (-22°F). Be sure to pack warm clothing and prepare for a range of cold weather conditions while traveling to Saint-Martin this month.
In Saint-Martin in December, the total precipitation amount is 188 mm (7.4 in), observed over a span of 16 days.
In Saint-Martin in December humidity is 91%. With an average temperature of -8°C (18°F), this humidity feels like an icy blanket that clings to your skin, making every step feel heavier as you navigate the frigid air while wrapped in layers, leaving you longing for warmth.
In Saint-Martin 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-Martin, you can visit Hourly UV Index in Saint-Martin.
UV Risk Categories
Weather in Saint-Martin varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Martin, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (16°F) | 135 mm (5.3 inches) | 91% | moderate |
| February Weather | -5°C (23°F) | 95 mm (3.8 inches) | 89% | moderate |
| March Weather | -2°C (29°F) | 122 mm (4.8 inches) | 87% | high |
| April Weather | 3°C (37°F) | 81 mm (3.2 inches) | 84% | very high |
| May Weather | 6°C (43°F) | 160 mm (6.3 inches) | 80% | very high |
| June Weather | 12°C (53°F) | 130 mm (5.1 inches) | 82% | extreme |
| July Weather | 14°C (57°F) | 121 mm (4.8 inches) | 82% | very high |
| August Weather | 13°C (56°F) | 129 mm (5.1 inches) | 77% | very high |
| September Weather | 9°C (49°F) | 90 mm (3.6 inches) | 81% | high |
| October Weather | 5°C (41°F) | 135 mm (5.3 inches) | 89% | high |
| November Weather | -2°C (29°F) | 98 mm (3.8 inches) | 89% | moderate |
| December Weather | -8°C (18°F) | 188 mm (7.4 inches) | 91% | low |