Last updated: June 24, 2025
In Windsor, United States, the average temperature in December hovers around -1°C (31°F), with extremes ranging from a frigid -20°C (-4°F) to a surprisingly mild 16°C (61°F). Expect 93 mm (3.7 in) of precipitation spread over about 12 days, contributing to an average humidity of 85%. Stay prepared for a crisp and damp winter experience!
In December in Windsor, the average temperature is -1°C (31°F), with maximums reaching 16°C (61°F) and minimums dipping as low as -20°C (-4°F). Be prepared for a wide range of temperatures if you plan to travel to Windsor this month.
In Windsor in December, the precipitation amount is 93 mm (3.7 in) over the course of 12 days.
In Windsor in December, humidity is 85%. With an average temperature of -1°C (31°F), this humidity feels like an uncomfortable chill that makes any outdoor travel feel damp and biting, penetrating through layers of clothing and making each breath feel cold and heavy.
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 | -3°C (26°F) | 77 mm (3.0 inches) | 87% | moderate |
| February Weather | -2°C (29°F) | 93 mm (3.7 inches) | 85% | moderate |
| March Weather | 1°C (35°F) | 92 mm (3.6 inches) | 85% | high |
| April Weather | 8°C (46°F) | 125 mm (4.9 inches) | 83% | very high |
| May Weather | 14°C (58°F) | 135 mm (5.3 inches) | 75% | very high |
| June Weather | 19°C (66°F) | 111 mm (4.4 inches) | 73% | very high |
| July Weather | 22°C (72°F) | 129 mm (5.1 inches) | 65% | very high |
| August Weather | 21°C (70°F) | 119 mm (4.7 inches) | 62% | very high |
| September Weather | 17°C (63°F) | 99 mm (3.9 inches) | 66% | very high |
| October Weather | 12°C (53°F) | 142 mm (5.6 inches) | 79% | high |
| November Weather | 3°C (38°F) | 99 mm (3.9 inches) | 87% | moderate |
| December Weather | -1°C (31°F) | 93 mm (3.7 inches) | 85% | low |