Last updated: June 18, 2025
In December, the average temperature in Gravenhurst, Canada hovers around -4°C (24°F). Expect minimum chills of -30°C (-21°F) and a warm peak at 16°C (61°F). During this month, you'll encounter 92 mm (3.6 in) of precipitation spread across 15 days, leading to a notably high average humidity of 91%.
In December in Gravenhurst, the average temperature is -4°C (24°F). The maximum can reach 16°C (61°F), while the minimum can drop as low as -30°C (-21°F). Travelers should be well-prepared for a wide range of temperatures, from chilly days to unexpectedly warm spells.
In Gravenhurst in December, the precipitation amount is 92 mm (3.6 in) distributed over 15 days.
In Gravenhurst in December humidity is 91%. With an average temperature of -4°C (24°F), this humidity feels like an icy grip that seeps into your bones, making travel uncomfortable and challenging as the cold air, mixed with high moisture, creates a biting chill that discourages outdoor exploration.
In Gravenhurst 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 Gravenhurst, you can visit Hourly UV Index in Gravenhurst.
UV Risk Categories
Weather in Gravenhurst varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Gravenhurst, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 71 mm (2.8 inches) | 93% | low |
| February Weather | -7°C (20°F) | 83 mm (3.3 inches) | 94% | moderate |
| March Weather | -3°C (27°F) | 70 mm (2.7 inches) | 87% | moderate |
| April Weather | 4°C (40°F) | 113 mm (4.4 inches) | 82% | very high |
| May Weather | 11°C (53°F) | 103 mm (4.0 inches) | 74% | very high |
| June Weather | 17°C (63°F) | 119 mm (4.7 inches) | 68% | very high |
| July Weather | 20°C (69°F) | 102 mm (4.0 inches) | 67% | very high |
| August Weather | 19°C (67°F) | 138 mm (5.4 inches) | 67% | very high |
| September Weather | 15°C (59°F) | 114 mm (4.5 inches) | 74% | high |
| October Weather | 9°C (49°F) | 107 mm (4.2 inches) | 83% | moderate |
| November Weather | 1°C (34°F) | 105 mm (4.1 inches) | 89% | moderate |
| December Weather | -4°C (24°F) | 92 mm (3.6 inches) | 91% | low |