Last updated: June 24, 2025
In Big Timber, United States, the average temperature in December hovers around -5°C (24°F). During this time, expect minimum temperatures to plummet to -26°C (-14°F), while maximums can reach a surprising 15°C (60°F). Precipitation totals about 37 mm (1.5 in) over 9 days, and humidity levels linger at a high 94%, creating a brisk and damp atmosphere. Adjust your wardrobe accordingly!
In December in Big Timber, the average temperature is -5°C (24°F), with maximums reaching up to 15°C (60°F) and minimums dropping as low as -26°C (-14°F). It's essential to pack warm clothing and prepare for significant temperature fluctuations while traveling during this time.
In Big Timber in December, the precipitation amount is 37 mm (1.5 in) over a span of 9 days.
In Big Timber 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 Big Timber 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 Big Timber, you can visit Hourly UV Index in Big Timber.
UV Risk Categories
Weather in Big Timber varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Big Timber, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 24 mm (0.9 inches) | 93% | moderate |
| February Weather | -8°C (18°F) | 60 mm (2.4 inches) | 92% | moderate |
| March Weather | -1°C (31°F) | 49 mm (1.9 inches) | 89% | high |
| April Weather | 3°C (37°F) | 78 mm (3.1 inches) | 83% | very high |
| May Weather | 9°C (48°F) | 112 mm (4.4 inches) | 79% | very high |
| June Weather | 15°C (59°F) | 81 mm (3.2 inches) | 76% | extreme |
| July Weather | 19°C (67°F) | 35 mm (1.4 inches) | 74% | very high |
| August Weather | 18°C (65°F) | 39 mm (1.5 inches) | 69% | very high |
| September Weather | 13°C (56°F) | 59 mm (2.3 inches) | 67% | very high |
| October Weather | 4°C (40°F) | 60 mm (2.4 inches) | 72% | high |
| November Weather | -1°C (31°F) | 41 mm (1.6 inches) | 89% | moderate |
| December Weather | -5°C (24°F) | 37 mm (1.5 inches) | 94% | low |