Last updated: June 18, 2025
In December, the average temperature in Saint-Nazaire, Canada hovers around -10°C (15°F), with extremes reaching as low as -31°C (-23°F) and peaking at a brisk 10°C (50°F). Expect 77 mm (3.0 in) of precipitation spread over 14 days, and beware of the high average humidity at a whopping 97%. Perfect conditions for a winter wonderland!
In December in Saint-Nazaire, the average temperature is -10°C (15°F). Maximum temperatures can reach 10°C (50°F), while minimum temperatures can drop to as low as -31°C (-23°F). It's advisable to prepare for a wide range of temperatures if you plan to travel during this time.
In Saint-Nazaire in December, the precipitation amount is 77 mm (3.0 in) over the course of 14 days.
In Saint-Nazaire in December, humidity is 97%. With an average temperature of -10°C (15°F), this humidity feels like an icy blanket wrapping around you, making it difficult to breathe while traveling and causing every breath to feel sharp and cold against your lungs.
In Saint-Nazaire 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 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 | -13°C (9°F) | 66 mm (2.6 inches) | 96% | low |
| February Weather | -12°C (11°F) | 59 mm (2.3 inches) | 94% | moderate |
| March Weather | -6°C (22°F) | 81 mm (3.2 inches) | 91% | moderate |
| April Weather | 2°C (36°F) | 86 mm (3.4 inches) | 90% | high |
| May Weather | 10°C (51°F) | 95 mm (3.7 inches) | 80% | very high |
| June Weather | 16°C (61°F) | 83 mm (3.3 inches) | 73% | very high |
| July Weather | 20°C (68°F) | 122 mm (4.8 inches) | 81% | very high |
| August Weather | 18°C (65°F) | 116 mm (4.6 inches) | 84% | very high |
| September Weather | 13°C (56°F) | 125 mm (4.9 inches) | 85% | high |
| October Weather | 7°C (44°F) | 123 mm (4.8 inches) | 89% | moderate |
| November Weather | -1°C (30°F) | 99 mm (3.9 inches) | 91% | low |
| December Weather | -10°C (15°F) | 77 mm (3.0 inches) | 97% | low |