Last updated: June 18, 2025
In December, the average temperature in Westlake, Canada hovers around -10°C (15°F), with extremes ranging from a chilly -39°C (-37°F) to a mild 7°C (46°F). Expect a moderate precipitation of 23 mm (0.9 in) spread over about 7 days, accompanied by a high average humidity of 96%. Bundle up and prepare for some frosty days!
In December in Westlake, the average temperature is -10°C (15°F), with maximums reaching up to 7°C (46°F) and minimums plummeting as low as -39°C (-37°F). Travelers should be prepared for extremely cold conditions and ensure they pack appropriate winter gear to stay warm and safe.
In Westlake in December, the total precipitation amount is 23 mm (0.9 in) over a duration of 7 days.
In Westlake in December, humidity is 96%. With an average temperature of -10°C (15°F), this humidity feels like a chilling mist that clings to your skin, making every breath crisp and biting, and causing everything around you to feel damp and frosty, which can be quite uncomfortable for traveling.
In Westlake 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 Westlake.
UV Risk Categories
Weather in Westlake varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Westlake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (14°F) | 22 mm (0.9 inches) | 93% | low |
| February Weather | -12°C (10°F) | 29 mm (1.2 inches) | 94% | low |
| March Weather | -5°C (23°F) | 31 mm (1.2 inches) | 89% | moderate |
| April Weather | 2°C (35°F) | 32 mm (1.3 inches) | 85% | moderate |
| May Weather | 11°C (52°F) | 40 mm (1.6 inches) | 81% | high |
| June Weather | 15°C (59°F) | 71 mm (2.8 inches) | 78% | high |
| July Weather | 17°C (62°F) | 101 mm (4.0 inches) | 84% | very high |
| August Weather | 15°C (60°F) | 53 mm (2.1 inches) | 81% | high |
| September Weather | 10°C (50°F) | 53 mm (2.1 inches) | 80% | high |
| October Weather | 3°C (37°F) | 42 mm (1.6 inches) | 86% | moderate |
| November Weather | -5°C (23°F) | 57 mm (2.2 inches) | 91% | low |
| December Weather | -10°C (15°F) | 23 mm (0.9 inches) | 96% | low |