Last updated: August 23, 2025
In December, the average temperature in Saint-Nazaire, France hovers around 9°C (48°F). Be prepared for chilly days, with minimum temperatures possibly dropping to 0°C (32°F) and highs reaching up to 15°C (59°F). It's a wet month too, with 112 mm (4.4 in) of precipitation spread over approximately 15 days. Don't forget your umbrella; the average humidity is a brisk 90%!
In December in Saint-Nazaire, the average temperature is 9°C (48°F). The maximum can reach 15°C (59°F) and the minimum can be as low as 0°C (32°F). Prepare for a cool and refreshing climate, perfect for layered outfits and exploring the sights!
In Saint-Nazaire in December, the precipitation amount is 112 mm (4.4 in) spread over a period of 15 days.
In Saint-Nazaire in December, humidity is 90%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration quite uncomfortable and requiring heavier layers to stay warm and dry.
In Saint-Nazaire 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-Nazaire, you can visit Hourly UV Index in Saint-Nazaire.
UV Risk Categories
Weather in Saint-Nazaire varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Nazaire, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (45°F) | 50 mm (2.0 inches) | 88% | low |
| February Weather | 8°C (47°F) | 67 mm (2.6 inches) | 87% | moderate |
| March Weather | 10°C (50°F) | 67 mm (2.6 inches) | 84% | moderate |
| April Weather | 12°C (54°F) | 43 mm (1.7 inches) | 83% | high |
| May Weather | 15°C (59°F) | 59 mm (2.3 inches) | 81% | very high |
| June Weather | 18°C (65°F) | 71 mm (2.8 inches) | 75% | very high |
| July Weather | 20°C (68°F) | 41 mm (1.6 inches) | 65% | very high |
| August Weather | 19°C (67°F) | 48 mm (1.9 inches) | 67% | very high |
| September Weather | 17°C (63°F) | 39 mm (1.5 inches) | 75% | high |
| October Weather | 14°C (58°F) | 82 mm (3.2 inches) | 85% | moderate |
| November Weather | 10°C (50°F) | 78 mm (3.1 inches) | 88% | low |
| December Weather | 9°C (48°F) | 112 mm (4.4 inches) | 90% | low |