Last updated: August 23, 2025
In Chatillon-Saint-Jean, France, the average temperature in December hovers around 4°C (39°F). Expect chilly days with a minimum drop to -8°C (19°F) and a mild peak of 16°C (61°F). The region witnesses approximately 150 mm (5.9 in) of precipitation spread over 17 days, contributing to a high average humidity of 90%. Embrace the cool, damp atmosphere!
In December in Chatillon-Saint-Jean, the average temperature is 4°C (39°F). Maximums can reach 16°C (61°F) and minimums can be as low as -8°C (19°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warmth and chill.
In Chatillon-Saint-Jean in December, the precipitation amount is 150 mm (5.9 in) over a span of 17 days.
In Chatillon-Saint-Jean in December humidity is 90%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm while navigating the misty streets.
In Chatillon-Saint-Jean 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 Chatillon-Saint-Jean, you can visit Hourly UV Index in Chatillon-Saint-Jean.
UV Risk Categories
Weather in Chatillon-Saint-Jean varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Chatillon-Saint-Jean, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 71 mm (2.8 inches) | 91% | low |
| February Weather | 5°C (42°F) | 71 mm (2.8 inches) | 87% | moderate |
| March Weather | 8°C (46°F) | 84 mm (3.3 inches) | 84% | moderate |
| April Weather | 11°C (51°F) | 59 mm (2.3 inches) | 83% | high |
| May Weather | 14°C (58°F) | 130 mm (5.1 inches) | 78% | very high |
| June Weather | 19°C (66°F) | 92 mm (3.6 inches) | 75% | very high |
| July Weather | 21°C (71°F) | 55 mm (2.2 inches) | 72% | very high |
| August Weather | 21°C (70°F) | 53 mm (2.1 inches) | 63% | very high |
| September Weather | 17°C (63°F) | 47 mm (1.8 inches) | 73% | high |
| October Weather | 12°C (54°F) | 102 mm (4.0 inches) | 89% | moderate |
| November Weather | 7°C (44°F) | 104 mm (4.1 inches) | 90% | moderate |
| December Weather | 4°C (39°F) | 150 mm (5.9 inches) | 90% | low |