Last updated: August 23, 2025
In December, the average temperature in Mery-sur-Seine, France hovers around 6°C (43°F). Expect a chilly minimum of -4°C (24°F) and a pleasant maximum of 17°C (63°F). During this month, you can anticipate 109 mm (4.3 in) of precipitation over approximately 17 days, accompanied by a high average humidity level of 93%.
In December in Mery-sur-Seine, the average temperature is 6°C (43°F). The maximum can reach 17°C (63°F), and the minimum can be as low as -4°C (24°F). Travelers should pack layers to comfortably enjoy the varied temperatures during their visit.
In Mery-sur-Seine in December, the precipitation amount is 109 mm (4.3 in), occurring over the course of 17 days.
In Mery-sur-Seine in December, humidity is 93%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel particularly uncomfortable and the air feel heavy, as though every step is met with resistance.
In Mery-sur-Seine in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Mery-sur-Seine.
UV Risk Categories
Weather in Mery-sur-Seine varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mery-sur-Seine, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 77 mm (3.0 inches) | 91% | low |
| February Weather | 6°C (43°F) | 66 mm (2.6 inches) | 89% | moderate |
| March Weather | 8°C (47°F) | 69 mm (2.7 inches) | 86% | moderate |
| April Weather | 11°C (52°F) | 32 mm (1.3 inches) | 84% | high |
| May Weather | 15°C (59°F) | 69 mm (2.7 inches) | 82% | very high |
| June Weather | 19°C (67°F) | 66 mm (2.6 inches) | 82% | very high |
| July Weather | 21°C (70°F) | 52 mm (2.0 inches) | 80% | very high |
| August Weather | 21°C (69°F) | 48 mm (1.9 inches) | 76% | very high |
| September Weather | 17°C (63°F) | 51 mm (2.0 inches) | 81% | high |
| October Weather | 13°C (55°F) | 76 mm (3.0 inches) | 88% | moderate |
| November Weather | 7°C (45°F) | 69 mm (2.7 inches) | 92% | low |
| December Weather | 6°C (43°F) | 109 mm (4.3 inches) | 93% | low |