Last updated: June 24, 2025
In December, the average temperature in Butte, United States hovers around -8°C (18°F). Expect a chilly range, with minimum temperatures plunging to -30°C (-21°F) and maximums reaching up to 14°C (57°F). During this time, anticipate about 30 mm (1.2 in) of precipitation spread across 8 days, coupled with a high average humidity of 96%. Stay warm and prepared for the elements!
In December in Butte, the average temperature is -8°C (18°F). Maximum can reach 14°C (57°F) and minimum can be as low as -30°C (-21°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for chilly conditions.
In Butte in December, the precipitation amount is 30 mm (1.2 in) over the course of 8 days.
In Butte in December humidity is 96%. With an average temperature of -8°C (18°F), this humidity feels like an icy embrace, making traveling quite challenging as the cold dampness seeps into your bones, leaving you feeling chilled and uncomfortable.
In Butte 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 Butte, you can visit Hourly UV Index in Butte.
UV Risk Categories
Weather in Butte varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Butte, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 22 mm (0.9 inches) | 94% | moderate |
| February Weather | -9°C (17°F) | 58 mm (2.3 inches) | 93% | moderate |
| March Weather | -3°C (28°F) | 39 mm (1.5 inches) | 91% | high |
| April Weather | 1°C (33°F) | 63 mm (2.5 inches) | 87% | very high |
| May Weather | 7°C (45°F) | 89 mm (3.5 inches) | 83% | very high |
| June Weather | 13°C (55°F) | 94 mm (3.7 inches) | 80% | extreme |
| July Weather | 17°C (64°F) | 29 mm (1.1 inches) | 75% | very high |
| August Weather | 16°C (62°F) | 31 mm (1.2 inches) | 66% | very high |
| September Weather | 11°C (53°F) | 38 mm (1.5 inches) | 66% | very high |
| October Weather | 2°C (37°F) | 42 mm (1.7 inches) | 77% | moderate |
| November Weather | -3°C (27°F) | 34 mm (1.3 inches) | 91% | moderate |
| December Weather | -8°C (18°F) | 30 mm (1.2 inches) | 96% | low |