Last updated: June 18, 2025
In Windsor, Canada, the average temperature in December hovers around -5°C (23°F), with extremes ranging from a frigid -28°C (-18°F) to a mild 15°C (60°F). Expect about 83 mm (3.3 in) of precipitation spread over 14 days, contributing to an average humidity level of 85%.
In December in Windsor, the average temperature is -5°C (23°F), with maximums reaching 15°C (60°F) and minimums plummeting to as low as -28°C (-18°F). This drastic variation in temperature makes it essential for travelers to pack accordingly and be prepared for both chilly and mild days.
In Windsor in December, the precipitation amount is 83 mm (3.3 in) spread over a period of 14 days.
In Windsor in December, humidity is 85%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that clings to your skin, making even the briefest outdoor excursions feel daunting and uncomfortable.
In Windsor 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 Windsor, you can visit Hourly UV Index in Windsor.
UV Risk Categories
Weather in Windsor varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Windsor, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 86 mm (3.4 inches) | 91% | low |
| February Weather | -7°C (20°F) | 82 mm (3.2 inches) | 89% | moderate |
| March Weather | -2°C (28°F) | 82 mm (3.2 inches) | 85% | moderate |
| April Weather | 5°C (42°F) | 115 mm (4.5 inches) | 84% | high |
| May Weather | 12°C (55°F) | 105 mm (4.1 inches) | 78% | very high |
| June Weather | 17°C (63°F) | 130 mm (5.1 inches) | 72% | very high |
| July Weather | 20°C (68°F) | 120 mm (4.7 inches) | 75% | very high |
| August Weather | 19°C (67°F) | 123 mm (4.8 inches) | 74% | very high |
| September Weather | 15°C (59°F) | 78 mm (3.1 inches) | 77% | high |
| October Weather | 9°C (48°F) | 138 mm (5.4 inches) | 85% | moderate |
| November Weather | 1°C (33°F) | 115 mm (4.5 inches) | 86% | moderate |
| December Weather | -5°C (23°F) | 83 mm (3.3 inches) | 85% | low |