Last updated: June 24, 2025
In December, the average temperature in Mountain Green, United States hovers around -5°C (24°F), with the potential for minimums as low as -20°C (-4°F) and maximums reaching 11°C (51°F). Expect 64 mm (2.5 in) of precipitation over approximately 10 days, coupled with a high average humidity of 88%. Be prepared for chilly and damp days!
In December in Mountain Green, the average temperature is -5°C (24°F). The maximum can reach 11°C (51°F), while the minimum can drop as low as -20°C (-4°F). Be prepared for chilly weather and pack appropriate winter clothing if you plan to travel during this time.
In Mountain Green in December, the precipitation amount is 64 mm (2.5 in) over a span of 10 days.
In Mountain Green in December humidity is 88%. With an average temperature of -5°C (24°F), this humidity feels like a chilly fog enveloping you, making every breath feel heavy and damp, which can turn a simple stroll into a challenge as you navigate the colder air mixed with the moisture.
In Mountain Green 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 Green, you can check the information here.
UV Risk Categories
Weather in Mountain Green varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mountain Green, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (24°F) | 70 mm (2.8 inches) | 91% | moderate |
| February Weather | -3°C (27°F) | 88 mm (3.5 inches) | 92% | moderate |
| March Weather | 2°C (36°F) | 68 mm (2.7 inches) | 84% | very high |
| April Weather | 5°C (41°F) | 71 mm (2.8 inches) | 74% | extreme |
| May Weather | 10°C (51°F) | 68 mm (2.7 inches) | 62% | extreme |
| June Weather | 17°C (63°F) | 23 mm (0.9 inches) | 56% | extreme |
| July Weather | 22°C (72°F) | 20 mm (0.8 inches) | 44% | extreme |
| August Weather | 21°C (69°F) | 26 mm (1.0 inches) | 37% | extreme |
| September Weather | 15°C (60°F) | 37 mm (1.5 inches) | 46% | very high |
| October Weather | 6°C (43°F) | 53 mm (2.1 inches) | 67% | high |
| November Weather | 1°C (34°F) | 56 mm (2.2 inches) | 84% | moderate |
| December Weather | -5°C (24°F) | 64 mm (2.5 inches) | 88% | moderate |