Last updated: June 18, 2025
In Grand Falls-Windsor, Canada, the average temperature in December hovers around -2°C (28°F), with minimums dipping to -19°C (-1°F) and maximums reaching a mild 14°C (57°F). Expect about 118 mm (4.6 in) of precipitation spread over 16 days, accompanied by a high average humidity of 88%.
In December in Grand Falls-Windsor, the average temperature is -2°C (28°F), with maximums reaching 14°C (57°F) and minimums dipping as low as -19°C (-1°F). It’s advisable to prepare for a wide range of weather conditions if you're planning to travel during this time.
In Grand Falls-Windsor in December, the precipitation amount is 118 mm (4.6 in) over the course of 16 days.
In Grand Falls-Windsor in December humidity is 88%. With an average temperature of -2°C (28°F), this humidity feels like an icy cling to your skin, making every breath feel brisk and sharp, while the dampness cuts through layers of clothing, leaving travelers yearning for warmth and comfort.
In Grand Falls-Windsor 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 Grand Falls-Windsor.
UV Risk Categories
Weather in Grand Falls-Windsor varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grand Falls-Windsor, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 85 mm (3.3 inches) | 88% | low |
| February Weather | -7°C (20°F) | 94 mm (3.7 inches) | 90% | moderate |
| March Weather | -3°C (26°F) | 114 mm (4.5 inches) | 89% | moderate |
| April Weather | 2°C (36°F) | 119 mm (4.7 inches) | 90% | high |
| May Weather | 6°C (44°F) | 103 mm (4.1 inches) | 87% | very high |
| June Weather | 13°C (55°F) | 101 mm (4.0 inches) | 79% | very high |
| July Weather | 17°C (62°F) | 72 mm (2.8 inches) | 88% | very high |
| August Weather | 18°C (64°F) | 79 mm (3.1 inches) | 90% | high |
| September Weather | 13°C (55°F) | 100 mm (3.9 inches) | 89% | high |
| October Weather | 7°C (45°F) | 90 mm (3.5 inches) | 88% | moderate |
| November Weather | 2°C (36°F) | 107 mm (4.2 inches) | 87% | low |
| December Weather | -2°C (28°F) | 118 mm (4.6 inches) | 88% | low |