Last updated: June 24, 2025
In December, the average temperature in Mountain Home, United States hovers around 7°C (44°F), with a minimum dipping to -10°C (14°F) and a peak reaching 26°C (80°F). Expect about 83 mm (3.3 in) of precipitation over 7 days, making it a rather wet month. With an average humidity of 87%, don’t forget your umbrella and prepare for a damp atmosphere!
In December in Mountain Home, the average temperature is 7°C (44°F). The maximum can reach 26°C (80°F), while the minimum can drop to as low as -10°C (14°F). This makes Mountain Home an ideal destination for travelers looking to experience a wide range of temperatures.
In Mountain Home in December, the total precipitation amount is 83 mm (3.3 in) over the course of 7 days.
In Mountain Home in December, humidity is 87%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring travelers to layer up to stay warm and dry.
In Mountain Home in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Mountain Home, you can check the information here.
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 | 3°C (39°F) | 77 mm (3.0 inches) | 81% | moderate |
| February Weather | 5°C (41°F) | 107 mm (4.2 inches) | 78% | high |
| March Weather | 11°C (52°F) | 136 mm (5.4 inches) | 76% | high |
| April Weather | 14°C (58°F) | 137 mm (5.4 inches) | 78% | very high |
| May Weather | 20°C (68°F) | 167 mm (6.6 inches) | 83% | very high |
| June Weather | 25°C (77°F) | 82 mm (3.2 inches) | 83% | extreme |
| July Weather | 27°C (81°F) | 67 mm (2.7 inches) | 78% | extreme |
| August Weather | 26°C (79°F) | 104 mm (4.1 inches) | 68% | very high |
| September Weather | 24°C (75°F) | 58 mm (2.3 inches) | 64% | very high |
| October Weather | 16°C (62°F) | 100 mm (3.9 inches) | 70% | high |
| November Weather | 9°C (49°F) | 72 mm (2.9 inches) | 83% | moderate |
| December Weather | 7°C (44°F) | 83 mm (3.3 inches) | 87% | moderate |