Last updated: June 24, 2025
In December, the average temperature in Columbia Falls, United States hovers around -2°C (29°F), with extremes ranging from a chilly -22°C (-7°F) to a mild 15°C (59°F). Expect 141 mm (5.5 in) of precipitation spread over 10 days, resulting in an average humidity of 84%. Dress warmly and prepare for a mix of weather!
In December in Columbia Falls, the average temperature is -2°C (29°F), with maximums reaching up to 15°C (59°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide temperature range and pack accordingly for both cold and milder conditions.
In Columbia Falls in December, the precipitation amount is 141 mm (5.5 in) over a span of 10 days.
In Columbia Falls in December, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.
In Columbia 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 Columbia Falls, you can visit Hourly UV Index in Columbia Falls.
UV Risk Categories
Weather in Columbia Falls varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Columbia Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 105 mm (4.1 inches) | 88% | low |
| February Weather | -4°C (26°F) | 96 mm (3.8 inches) | 88% | moderate |
| March Weather | 0°C (32°F) | 80 mm (3.1 inches) | 85% | moderate |
| April Weather | 6°C (42°F) | 138 mm (5.4 inches) | 81% | high |
| May Weather | 11°C (52°F) | 110 mm (4.3 inches) | 76% | very high |
| June Weather | 16°C (61°F) | 98 mm (3.9 inches) | 74% | very high |
| July Weather | 19°C (66°F) | 88 mm (3.5 inches) | 74% | very high |
| August Weather | 19°C (67°F) | 80 mm (3.2 inches) | 74% | very high |
| September Weather | 16°C (61°F) | 93 mm (3.7 inches) | 77% | high |
| October Weather | 10°C (51°F) | 119 mm (4.7 inches) | 82% | moderate |
| November Weather | 4°C (39°F) | 138 mm (5.4 inches) | 85% | moderate |
| December Weather | -2°C (29°F) | 141 mm (5.5 inches) | 84% | low |