Last updated: June 24, 2025
In December, the average temperature in Fort Greely, United States hovers around -14°C (7°F), with extremes ranging from a biting -37°C (-35°F) to a mild 2°C (36°F). Expect about 34 mm (1.3 in) of precipitation over 7 days, accompanied by a high average humidity of 96%, making this a truly chilly and damp month.
In December in Fort Greely, the average temperature is -14°C (7°F). Maximum temperatures can reach 2°C (36°F), while minimums can drop as low as -37°C (-35°F). Travelers should prepare for extremely cold conditions and consider appropriate winter gear if visiting during this time.
In Fort Greely in December, the total precipitation amount is 34 mm (1.3 in) over the course of 7 days.
In Fort Greely in December humidity is 96%. With an average temperature of -14°C (7°F), this humidity feels like an icy fog enveloping you, making every breath feel heavy and biting, which can be invigorating yet challenging for traveling.
In Fort Greely in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Fort Greely.
UV Risk Categories
Weather in Fort Greely varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fort Greely, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -18°C (0°F) | 14 mm (0.6 inches) | 95% | low |
| February Weather | -16°C (4°F) | 21 mm (0.8 inches) | 93% | low |
| March Weather | -10°C (14°F) | 24 mm (0.9 inches) | 93% | low |
| April Weather | 0°C (33°F) | 23 mm (0.9 inches) | 91% | moderate |
| May Weather | 10°C (50°F) | 42 mm (1.7 inches) | 87% | moderate |
| June Weather | 15°C (60°F) | 78 mm (3.1 inches) | 86% | moderate |
| July Weather | 17°C (63°F) | 74 mm (2.9 inches) | 93% | high |
| August Weather | 13°C (56°F) | 119 mm (4.7 inches) | 94% | moderate |
| September Weather | 8°C (46°F) | 56 mm (2.2 inches) | 94% | moderate |
| October Weather | -1°C (30°F) | 48 mm (1.9 inches) | 97% | low |
| November Weather | -13°C (9°F) | 33 mm (1.3 inches) | 99% | low |
| December Weather | -14°C (7°F) | 34 mm (1.3 inches) | 96% | low |