Last updated: June 24, 2025
In December, the average temperature in Crystal Falls, United States hovers around -6°C (22°F). Expect chilly extremes, with minimums dropping to -31°C (-24°F) and maximums reaching up to 13°C (56°F). With an average humidity of 87%, you'll feel the cold even more! During this month, anticipate 55 mm (2.2 in) of precipitation spread over 9 days, so be sure to dress warmly and stay prepared for a mix of winter weather.
In December in Crystal Falls, the average temperature is -6°C (22°F), with maximums reaching 13°C (56°F) and minimums dropping as low as -31°C (-24°F). Travelers should be prepared for significant temperature fluctuations and dress in layers to stay comfortable during their visit.
In Crystal Falls in December, the precipitation amount is 55 mm (2.2 in) over a span of 9 days.
In Crystal Falls in December, humidity is 87%. With an average temperature of -6°C (22°F), this humidity feels like a chilling weight on your skin, making traveling quite uncomfortable as you face an icy dampness that seeps into your layers, amplifying the cold and making every step feel arduous.
In Crystal Falls 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 Crystal Falls, you can visit Hourly UV Index in Crystal Falls.
UV Risk Categories
Weather in Crystal Falls varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Crystal Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (16°F) | 33 mm (1.3 inches) | 89% | low |
| February Weather | -9°C (16°F) | 49 mm (1.9 inches) | 90% | moderate |
| March Weather | -3°C (27°F) | 47 mm (1.9 inches) | 87% | moderate |
| April Weather | 3°C (38°F) | 87 mm (3.4 inches) | 84% | high |
| May Weather | 12°C (54°F) | 79 mm (3.1 inches) | 77% | very high |
| June Weather | 18°C (65°F) | 94 mm (3.7 inches) | 75% | very high |
| July Weather | 21°C (70°F) | 100 mm (4.0 inches) | 74% | very high |
| August Weather | 19°C (66°F) | 114 mm (4.5 inches) | 73% | very high |
| September Weather | 15°C (59°F) | 95 mm (3.7 inches) | 78% | high |
| October Weather | 7°C (45°F) | 104 mm (4.1 inches) | 84% | moderate |
| November Weather | -1°C (30°F) | 53 mm (2.1 inches) | 89% | moderate |
| December Weather | -6°C (22°F) | 55 mm (2.2 inches) | 87% | low |