Last updated: June 18, 2025
In Mayo, Canada, the average temperature in December hovers around -20°C (-3°F), with extremes that can plunge to a chilling -44°C (-47°F) or rise to a mild 5°C (41°F). Expect 29 mm (1.2 in) of precipitation spread over 9 days, contributing to an astonishingly high average humidity of 99%. Prepare for a winter wonderland!
In December in Mayo, the average temperature is -20°C (-3°F). The maximum can reach 5°C (41°F) and the minimum can be as low as -44°C (-47°F). Travelers should be prepared for extreme cold conditions and dress appropriately for the harsh winter weather.
In Mayo in December, the precipitation amount is 29 mm (1.2 in) over a span of 9 days.
In Mayo in December humidity is 99%. With an average temperature of -20°C (-3°F), this humidity feels like an icy fog enveloping you, making every breath a challenge as the frigid air settles deep into your bones, complicating travel with a biting chill that nips at exposed skin and creates a sense of urgency to find warmth.
In Mayo 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 Mayo.
UV Risk Categories
Weather in Mayo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mayo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -22°C (-7°F) | 15 mm (0.6 inches) | 97% | low |
| February Weather | -23°C (-8°F) | 15 mm (0.6 inches) | 96% | low |
| March Weather | -13°C (10°F) | 14 mm (0.5 inches) | 93% | moderate |
| April Weather | -2°C (28°F) | 18 mm (0.7 inches) | 89% | moderate |
| May Weather | 8°C (47°F) | 45 mm (1.8 inches) | 84% | moderate |
| June Weather | 14°C (58°F) | 62 mm (2.4 inches) | 82% | high |
| July Weather | 16°C (61°F) | 60 mm (2.4 inches) | 84% | high |
| August Weather | 13°C (56°F) | 67 mm (2.6 inches) | 89% | moderate |
| September Weather | 7°C (45°F) | 46 mm (1.8 inches) | 91% | moderate |
| October Weather | -2°C (30°F) | 44 mm (1.7 inches) | 97% | low |
| November Weather | -16°C (4°F) | 33 mm (1.3 inches) | 100% | low |
| December Weather | -20°C (-3°F) | 29 mm (1.2 inches) | 99% | low |