Last updated: June 24, 2025
In Mountain Home, United States, the average temperature for December hovers around -1°C (31°F). Expect lows of -15°C (5°F) and highs reaching up to 13°C (56°F). During this month, there is an average precipitation of 45 mm (1.8 in) spread over 10 days, while humidity levels are generally high at 87%. Be prepared for crisp air and occasional showers!
In December in Mountain Home, the average temperature is -1°C (31°F). The maximum can reach 13°C (56°F), and the minimum can be as low as -15°C (5°F). Visitors should prepare for cold weather conditions but can expect a few mild days ideal for outdoor activities.
In Mountain Home in December, the precipitation amount is 45 mm (1.8 in) spread over a duration of 10 days.
In Mountain Home in December humidity is 87%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through your clothes, making traveling incredibly uncomfortable as it adds a layer of dampness to the already cold air, leaving you shivering and wishing for warmth.
In Mountain Home 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 Mountain Home, you can visit Hourly UV Index in Mountain Home.
UV Risk Categories
Weather in Mountain Home varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mountain Home, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 56 mm (2.2 inches) | 88% | moderate |
| February Weather | 1°C (34°F) | 59 mm (2.3 inches) | 89% | moderate |
| March Weather | 6°C (43°F) | 43 mm (1.7 inches) | 85% | high |
| April Weather | 9°C (49°F) | 38 mm (1.5 inches) | 79% | very high |
| May Weather | 14°C (58°F) | 41 mm (1.6 inches) | 71% | very high |
| June Weather | 20°C (68°F) | 22 mm (0.9 inches) | 71% | extreme |
| July Weather | 26°C (79°F) | 3 mm (0.1 inches) | 66% | extreme |
| August Weather | 24°C (76°F) | 10 mm (0.4 inches) | 50% | very high |
| September Weather | 18°C (66°F) | 12 mm (0.5 inches) | 48% | very high |
| October Weather | 10°C (50°F) | 27 mm (1.1 inches) | 65% | high |
| November Weather | 4°C (40°F) | 41 mm (1.6 inches) | 84% | moderate |
| December Weather | -1°C (31°F) | 45 mm (1.8 inches) | 87% | low |