Last updated: June 24, 2025
In December, the average temperature in Mountain Home, United States hovers around 6°C (43°F), with minimums dipping to a chilly -12°C (10°F) and occasional maximums reaching a pleasant 23°C (73°F). Be prepared for some rain, as the region receives about 133 mm (5.2 in) of precipitation over 9 days. With an average humidity level of 88%, it’s best to dress in layers and keep an umbrella handy!
In December in Mountain Home, the average temperature is 6°C (43°F). Maximums can reach 23°C (73°F), and minimums can drop as low as -12°C (10°F). This variability in temperature makes it essential for travelers to pack layers to stay comfortable during their visit.
In Mountain Home in December, the precipitation amount is 133 mm (5.2 in) spread over a duration of 9 days.
In Mountain Home in December, humidity is 88%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and prompting you to seek warm shelter frequently.
In Mountain Home in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Mountain Home for better planning.
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 | 4°C (40°F) | 104 mm (4.1 inches) | 86% | moderate |
| February Weather | 7°C (45°F) | 132 mm (5.2 inches) | 86% | high |
| March Weather | 10°C (50°F) | 103 mm (4.0 inches) | 86% | very high |
| April Weather | 14°C (57°F) | 139 mm (5.5 inches) | 82% | very high |
| May Weather | 18°C (65°F) | 141 mm (5.5 inches) | 85% | extreme |
| June Weather | 22°C (71°F) | 99 mm (3.9 inches) | 85% | extreme |
| July Weather | 23°C (74°F) | 115 mm (4.5 inches) | 83% | extreme |
| August Weather | 23°C (73°F) | 145 mm (5.7 inches) | 76% | very high |
| September Weather | 21°C (69°F) | 149 mm (5.9 inches) | 76% | very high |
| October Weather | 16°C (61°F) | 174 mm (6.8 inches) | 80% | very high |
| November Weather | 8°C (47°F) | 89 mm (3.5 inches) | 88% | high |
| December Weather | 6°C (43°F) | 133 mm (5.2 inches) | 88% | moderate |