Last updated: June 24, 2025
The average temperature in Heart Butte, United States during December is a brisk -5°C (24°F), with lows dipping to a chilly -32°C (-26°F) and highs reaching a milder 14°C (57°F). Expect precipitation of about 43 mm (1.7 in) over 9 days, coupled with an impressive average humidity of 94%. Embrace the crisp air and prepare for a cozy experience!
In December in Heart Butte, the average temperature is -5°C (24°F). The maximum can reach 14°C (57°F), while the minimum can drop to as low as -32°C (-26°F). Travelers should be prepared for a wide range of temperatures, ensuring they have suitable clothing for both mild and extreme cold conditions.
In Heart Butte in December, the precipitation amount reaches 43 mm (1.7 in) over the course of 9 days.
In Heart Butte in December, humidity is 94%. With an average temperature of -5°C (24°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel challenging as the cold dampness can easily turn any excursion into a race against the elements.
In Heart 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 Heart Butte, you can visit Hourly UV Index in Heart Butte.
UV Risk Categories
Weather in Heart Butte varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Heart Butte, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 25 mm (1.0 inches) | 93% | low |
| February Weather | -9°C (16°F) | 60 mm (2.4 inches) | 91% | moderate |
| March Weather | -2°C (29°F) | 39 mm (1.5 inches) | 88% | moderate |
| April Weather | 2°C (35°F) | 69 mm (2.7 inches) | 84% | very high |
| May Weather | 8°C (47°F) | 97 mm (3.8 inches) | 78% | very high |
| June Weather | 13°C (56°F) | 81 mm (3.2 inches) | 77% | very high |
| July Weather | 18°C (64°F) | 27 mm (1.1 inches) | 79% | very high |
| August Weather | 17°C (62°F) | 31 mm (1.2 inches) | 69% | very high |
| September Weather | 11°C (53°F) | 52 mm (2.1 inches) | 69% | high |
| October Weather | 3°C (38°F) | 52 mm (2.1 inches) | 78% | moderate |
| November Weather | -1°C (31°F) | 48 mm (1.9 inches) | 87% | moderate |
| December Weather | -5°C (24°F) | 43 mm (1.7 inches) | 94% | low |