Last updated: June 24, 2025
In December, the average temperature in Mountain City, United States hovers around 13°C (55°F). Expect a range that dips as low as -3°C (27°F) and can climb to a warm 29°C (84°F). During this month, precipitation totals about 73 mm (2.9 in) over approximately 7 days, accompanied by a high average humidity of 86%.
In December in Mountain City, the average temperature is 13°C (55°F). The maximum can reach 29°C (84°F), while the minimum can drop as low as -3°C (27°F). This range of temperatures makes Mountain City an ideal destination for travelers seeking mild weather with the possibility of both warm days and cool nights.
In Mountain City in December, the precipitation amount is 73 mm (2.9 in) during a span of 7 days.
In Mountain City in December humidity is 86%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket clinging to your skin, making travel quite uncomfortable and urging you to seek cooler, dryer spots.
In Mountain City in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Mountain City.
UV Risk Categories
Weather in Mountain City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mountain City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 11°C (52°F) | 48 mm (1.9 inches) | 79% | moderate |
| February Weather | 12°C (54°F) | 60 mm (2.4 inches) | 79% | very high |
| March Weather | 17°C (64°F) | 67 mm (2.6 inches) | 74% | very high |
| April Weather | 20°C (69°F) | 89 mm (3.5 inches) | 76% | extreme |
| May Weather | 25°C (76°F) | 149 mm (5.9 inches) | 81% | extreme |
| June Weather | 27°C (82°F) | 102 mm (4.0 inches) | 76% | extreme |
| July Weather | 29°C (84°F) | 79 mm (3.1 inches) | 66% | extreme |
| August Weather | 29°C (85°F) | 111 mm (4.4 inches) | 58% | extreme |
| September Weather | 26°C (79°F) | 112 mm (4.4 inches) | 65% | extreme |
| October Weather | 21°C (70°F) | 94 mm (3.7 inches) | 74% | very high |
| November Weather | 15°C (60°F) | 49 mm (1.9 inches) | 81% | high |
| December Weather | 13°C (55°F) | 73 mm (2.9 inches) | 86% | moderate |