Last updated: June 24, 2025
In December, the average temperature in Cass Lake, United States hovers around -8°C (17°F). However, be prepared for extremes, as temperatures can plummet to a chilling -33°C (-26°F) or rise to a milder 6°C (43°F). With precipitation measuring 47 mm (1.9 in) over approximately 9 days, moisture is abundant, and the air feels quite humid, with an average humidity of 89%. Stay warm and dry!
In December in Cass Lake, the average temperature is -8°C (17°F). The maximum can reach 6°C (43°F), while the minimum can drop as low as -33°C (-26°F). Travelers should be prepared for extremely cold conditions and dress in layers to stay warm while exploring.
In Cass Lake in December, the precipitation amount is 47 mm (1.9 in) spread over a period of 9 days.
In Cass Lake in December humidity is 89%. With an average temperature of -8°C (17°F), this humidity feels like an icy blanket wrapping around you, making every breath a sharp reminder of the cold as you navigate through the frosty air, dampening the spirit of travel and turning each step into a delicate dance to stay warm.
In Cass Lake 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 Cass Lake, you can visit Hourly UV Index in Cass Lake.
UV Risk Categories
Weather in Cass Lake varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cass Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -12°C (10°F) | 22 mm (0.9 inches) | 92% | low |
| February Weather | -13°C (10°F) | 25 mm (1.0 inches) | 93% | moderate |
| March Weather | -3°C (27°F) | 27 mm (1.1 inches) | 88% | moderate |
| April Weather | 3°C (37°F) | 58 mm (2.3 inches) | 83% | high |
| May Weather | 12°C (53°F) | 51 mm (2.0 inches) | 76% | very high |
| June Weather | 19°C (66°F) | 75 mm (2.9 inches) | 76% | very high |
| July Weather | 21°C (71°F) | 85 mm (3.3 inches) | 76% | very high |
| August Weather | 20°C (67°F) | 73 mm (2.9 inches) | 77% | very high |
| September Weather | 15°C (59°F) | 109 mm (4.3 inches) | 77% | high |
| October Weather | 7°C (44°F) | 98 mm (3.8 inches) | 82% | moderate |
| November Weather | -3°C (28°F) | 31 mm (1.2 inches) | 87% | moderate |
| December Weather | -8°C (17°F) | 47 mm (1.9 inches) | 89% | low |