Last updated: August 23, 2025
In December, the average temperature in Saint-Just-Chaleyssin, France hovers around 5°C (42°F). Expect chilly conditions, with minimum temperatures dropping to -4°C (25°F), while the mercury can rise to a comfortable 16°C (61°F). Be prepared for rain, as 129 mm (5.1 in) of precipitation typically falls over 17 days. Plus, with an average humidity of 92%, it’s wise to dress in layers and keep an umbrella handy!
In December in Saint-Just-Chaleyssin, the average temperature is 5°C (42°F). Maximums can reach 16°C (61°F), and minimums can be as low as -4°C (25°F). It's a great time for travelers who enjoy cool weather and want to explore the area's winter scenery.
In Saint-Just-Chaleyssin in December, the total precipitation amount reaches 129 mm (5.1 in), occurring over a span of 17 days.
In Saint-Just-Chaleyssin in December, humidity is 92%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
In Saint-Just-Chaleyssin 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-Just-Chaleyssin, you can visit Hourly UV Index in Saint-Just-Chaleyssin.
UV Risk Categories
Weather in Saint-Just-Chaleyssin varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Just-Chaleyssin, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 67 mm (2.6 inches) | 91% | low |
| February Weather | 6°C (44°F) | 59 mm (2.3 inches) | 88% | moderate |
| March Weather | 9°C (48°F) | 74 mm (2.9 inches) | 84% | moderate |
| April Weather | 12°C (54°F) | 47 mm (1.9 inches) | 81% | high |
| May Weather | 16°C (60°F) | 127 mm (5.0 inches) | 77% | very high |
| June Weather | 20°C (69°F) | 83 mm (3.3 inches) | 76% | very high |
| July Weather | 23°C (73°F) | 76 mm (3.0 inches) | 68% | very high |
| August Weather | 22°C (72°F) | 60 mm (2.4 inches) | 61% | very high |
| September Weather | 18°C (65°F) | 55 mm (2.2 inches) | 72% | high |
| October Weather | 13°C (56°F) | 97 mm (3.8 inches) | 88% | moderate |
| November Weather | 8°C (46°F) | 99 mm (3.9 inches) | 91% | moderate |
| December Weather | 5°C (42°F) | 129 mm (5.1 inches) | 92% | low |