Last updated: June 24, 2025
In Butte, United States, the average temperature in December hovers around -8°C (17°F). It's a chilly month, with lows plummeting to -26°C (-14°F) and highs reaching a mere 6°C (42°F). Expect significant precipitation, totaling 142 mm (5.6 in) over approximately 19 days, coupled with a high average humidity level of 96%. Stay warm and prepared!
In December in Butte, the average temperature is -8°C (17°F). The maximum can reach 6°C (42°F) and the minimum can be as low as -26°C (-14°F). Be sure to pack warm clothing and prepare for extreme cold if you're planning to travel here during this time.
In Butte in December, the precipitation amount is 142 mm (5.6 in), spread over 19 days.
In Butte in December humidity is 96%. With an average temperature of -8°C (17°F), this humidity feels like a biting cold that seeps into your bones, making it challenging for traveling as the dampness clings to your clothes and the chill enhances the discomfort, turning what should be a brisk adventure into a struggle against the elements.
In Butte in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the 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 | -12°C (11°F) | 80 mm (3.1 inches) | 94% | low |
| February Weather | -10°C (15°F) | 74 mm (2.9 inches) | 93% | low |
| March Weather | -7°C (20°F) | 72 mm (2.8 inches) | 91% | moderate |
| April Weather | 0°C (33°F) | 54 mm (2.1 inches) | 85% | moderate |
| May Weather | 5°C (42°F) | 75 mm (2.9 inches) | 88% | high |
| June Weather | 11°C (51°F) | 83 mm (3.3 inches) | 95% | high |
| July Weather | 13°C (56°F) | 89 mm (3.5 inches) | 102% | high |
| August Weather | 12°C (53°F) | 137 mm (5.4 inches) | 100% | moderate |
| September Weather | 7°C (45°F) | 127 mm (5.0 inches) | 96% | moderate |
| October Weather | 1°C (33°F) | 173 mm (6.8 inches) | 91% | low |
| November Weather | -9°C (17°F) | 114 mm (4.5 inches) | 95% | low |
| December Weather | -8°C (17°F) | 142 mm (5.6 inches) | 96% | low |