Last updated: June 24, 2025
In December, the average temperature in Jasper, United States hovers around -4°C (26°F). You'll want to prepare for a chilly range, with minimums dipping to -24°C (-11°F) and the occasional maximum reaching 15°C (59°F). Expect some moisture, too, as total precipitation amounts to 37 mm (1.5 in) over about 4 days. Don't forget that with an average humidity of 83%, the air will feel quite brisk!
In December in Jasper, the average temperature is -4°C (26°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -24°C (-11°F). It’s a great time for travelers to bundle up and enjoy the winter scenery while being prepared for significant temperature fluctuations.
In Jasper in December, the precipitation amount is 37 mm (1.5 in) over the course of 4 days.
In Jasper in December, humidity is 83%. With an average temperature of -4°C (26°F), this humidity feels like a chilling blanket that clings to your skin, making outdoor activities uncomfortable and forcing travelers to bundle up tightly, even as the cold penetrates through layers of clothing.
In Jasper in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Jasper, you can check the information here.
UV Risk Categories
Weather in Jasper varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jasper, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 22 mm (0.9 inches) | 80% | low |
| February Weather | -8°C (19°F) | 24 mm (0.9 inches) | 84% | moderate |
| March Weather | 1°C (34°F) | 61 mm (2.4 inches) | 75% | moderate |
| April Weather | 6°C (44°F) | 74 mm (2.9 inches) | 79% | very high |
| May Weather | 15°C (58°F) | 121 mm (4.8 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 94 mm (3.7 inches) | 81% | extreme |
| July Weather | 23°C (74°F) | 91 mm (3.6 inches) | 82% | very high |
| August Weather | 21°C (71°F) | 102 mm (4.0 inches) | 80% | very high |
| September Weather | 18°C (65°F) | 109 mm (4.3 inches) | 75% | very high |
| October Weather | 8°C (48°F) | 80 mm (3.2 inches) | 77% | moderate |
| November Weather | 1°C (34°F) | 26 mm (1.0 inches) | 85% | moderate |
| December Weather | -4°C (26°F) | 37 mm (1.5 inches) | 83% | moderate |