Last updated: June 24, 2025
In December, the average temperature in Amherst, United States hovers around -4°C (25°F). However, prepare for a wide range of temperatures, as minimums can plummet to -28°C (-19°F), while maximums can reach up to 16°C (61°F). This month also brings 53 mm (2.1 in) of precipitation over 7 days, with an average humidity of 87%, making for a chilly and damp atmosphere.
In December in Amherst, the average temperature is -4°C (25°F), with maximums reaching 16°C (61°F) and minimums plummeting to as low as -28°C (-19°F). This range of temperatures suggests that travelers should be prepared for cold weather, but with occasional milder days, making it a great time for winter activities and sightseeing.
In Amherst in December, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.
In Amherst in December humidity is 87%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that clings to your skin, making every step outside feel like an endeavor as the cold damp air numbs your senses and weighs you down, creating an atmosphere that is both invigorating and challenging for traveling.
In Amherst 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 Amherst, you can visit Hourly UV Index in Amherst.
UV Risk Categories
Weather in Amherst varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Amherst, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (19°F) | 38 mm (1.5 inches) | 89% | low |
| February Weather | -7°C (19°F) | 51 mm (2.0 inches) | 90% | moderate |
| March Weather | 0°C (33°F) | 62 mm (2.4 inches) | 87% | moderate |
| April Weather | 6°C (43°F) | 102 mm (4.0 inches) | 84% | very high |
| May Weather | 14°C (57°F) | 110 mm (4.3 inches) | 77% | very high |
| June Weather | 20°C (68°F) | 113 mm (4.5 inches) | 75% | very high |
| July Weather | 22°C (72°F) | 129 mm (5.1 inches) | 74% | very high |
| August Weather | 20°C (69°F) | 137 mm (5.4 inches) | 73% | very high |
| September Weather | 17°C (62°F) | 98 mm (3.8 inches) | 78% | high |
| October Weather | 9°C (49°F) | 106 mm (4.2 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 49 mm (1.9 inches) | 89% | moderate |
| December Weather | -4°C (25°F) | 53 mm (2.1 inches) | 87% | low |