Last updated: August 23, 2025
In December, the average temperature in Mars, France hovers around 5°C (41°F). Expect chilly days, with a minimum dip to -4°C (25°F) and a maximum rise to 16°C (61°F). Be prepared for wet conditions, as 132 mm (5.2 in) of precipitation falls over 19 days, and the air is often saturated with an average humidity of 93%.
In December in Mars, the average temperature is 5°C (41°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -4°C (25°F). Travelers should prepare for chilly weather and pack accordingly for both mild and cold conditions.
In Mars in December, the precipitation amount is 132 mm (5.2 in) over the course of 19 days.
In Mars in December, humidity is 93%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures feel more uncomfortable and reminding you to bundle up to stay warm while exploring the sights.
In Mars 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 Mars, you can visit Hourly UV Index in Mars.
UV Risk Categories
Weather in Mars varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mars, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 79 mm (3.1 inches) | 91% | low |
| February Weather | 6°C (43°F) | 61 mm (2.4 inches) | 89% | moderate |
| March Weather | 8°C (46°F) | 80 mm (3.1 inches) | 86% | moderate |
| April Weather | 11°C (52°F) | 50 mm (2.0 inches) | 84% | high |
| May Weather | 15°C (58°F) | 100 mm (4.0 inches) | 82% | very high |
| June Weather | 19°C (67°F) | 84 mm (3.3 inches) | 82% | very high |
| July Weather | 21°C (71°F) | 65 mm (2.6 inches) | 79% | very high |
| August Weather | 21°C (70°F) | 56 mm (2.2 inches) | 72% | very high |
| September Weather | 17°C (63°F) | 61 mm (2.4 inches) | 78% | high |
| October Weather | 12°C (54°F) | 88 mm (3.5 inches) | 88% | moderate |
| November Weather | 7°C (45°F) | 85 mm (3.4 inches) | 91% | moderate |
| December Weather | 5°C (41°F) | 132 mm (5.2 inches) | 93% | low |