Last updated: June 18, 2025
In December, the average temperature in Markham, Canada hovers around 0°C (33°F). Expect chilly conditions with a minimum of -19°C (-1°F) and a maximum reaching 13°C (55°F). Be prepared for wet weather, as precipitation averages 91 mm (3.6 in) over 14 days. Alongside this, you can anticipate a high average humidity of 87%, making for a brisk and damp atmosphere.
In December in Markham, the average temperature is 0°C (33°F). Maximums can reach 13°C (55°F), while minimums can drop as low as -19°C (-1°F). Travelers should be prepared for chilly conditions, including the potential for cold snaps, so pack warm clothing.
In Markham in December, the precipitation amount is 91 mm (3.6 in) over a span of 14 days.
In Markham in December, humidity is 87%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making every step feel heavier and the air thick and suffocating, often leading to a sense of discomfort while traveling.
In Markham 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 Markham, you can visit Hourly UV Index in Markham.
UV Risk Categories
Weather in Markham varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Markham, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 80 mm (3.2 inches) | 91% | low |
| February Weather | -3°C (28°F) | 83 mm (3.3 inches) | 91% | moderate |
| March Weather | 0°C (33°F) | 75 mm (2.9 inches) | 88% | moderate |
| April Weather | 5°C (41°F) | 118 mm (4.6 inches) | 88% | very high |
| May Weather | 10°C (50°F) | 103 mm (4.1 inches) | 82% | very high |
| June Weather | 16°C (62°F) | 80 mm (3.1 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 73 mm (2.9 inches) | 77% | very high |
| August Weather | 21°C (71°F) | 76 mm (3.0 inches) | 72% | very high |
| September Weather | 18°C (65°F) | 69 mm (2.7 inches) | 76% | high |
| October Weather | 12°C (54°F) | 115 mm (4.5 inches) | 83% | moderate |
| November Weather | 4°C (40°F) | 96 mm (3.8 inches) | 88% | moderate |
| December Weather | 0°C (33°F) | 91 mm (3.6 inches) | 87% | low |