Last updated: June 24, 2025
In December, the average temperature in Fort Benton, United States hovers around -2°C (29°F). While you might experience chilly lows of -29°C (-20°F), the mercury can rise to a mild 19°C (66°F) on warmer days. Expect about 26 mm (1.0 in) of precipitation spread over 6 days, and don’t forget, the average humidity is a brisk 90%, adding an extra chill to the air!
In December, in Fort Benton, the average temperature is -2°C (29°F), with a maximum that can reach 19°C (66°F) and a minimum that can drop as low as -29°C (-20°F). Be prepared for a wide range of temperatures when traveling to Fort Benton during this time.
In Fort Benton in December, the precipitation amount is 26 mm (1.0 in) over the course of 6 days.
In Fort Benton in December, humidity is 90%. With an average temperature of -2°C (29°F), this humidity feels like an icy breath enveloping you, making every step outdoors feel even colder and more biting, while also creating a heavy, wet atmosphere that can dampen your spirits for traveling.
In Fort Benton in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Fort Benton, you can visit Hourly UV Index in Fort Benton.
UV Risk Categories
Weather in Fort Benton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fort Benton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 17 mm (0.7 inches) | 87% | low |
| February Weather | -7°C (19°F) | 41 mm (1.6 inches) | 88% | moderate |
| March Weather | 1°C (34°F) | 23 mm (0.9 inches) | 83% | moderate |
| April Weather | 6°C (43°F) | 53 mm (2.1 inches) | 78% | high |
| May Weather | 13°C (56°F) | 56 mm (2.2 inches) | 76% | very high |
| June Weather | 19°C (66°F) | 56 mm (2.2 inches) | 78% | very high |
| July Weather | 23°C (74°F) | 13 mm (0.5 inches) | 77% | very high |
| August Weather | 22°C (71°F) | 18 mm (0.7 inches) | 71% | very high |
| September Weather | 16°C (60°F) | 30 mm (1.2 inches) | 68% | high |
| October Weather | 7°C (45°F) | 33 mm (1.3 inches) | 72% | moderate |
| November Weather | 3°C (38°F) | 31 mm (1.2 inches) | 84% | moderate |
| December Weather | -2°C (29°F) | 26 mm (1.0 inches) | 90% | low |