Last updated: June 24, 2025
In Swift Trail Junction, United States, the average temperature in December hovers around 8°C (47°F). While you might experience chilly lows of -4°C (25°F), the warmth can peak at a pleasant 23°C (73°F). During this month, anticipate 29 mm (1.1 in) of precipitation spread over 4 days, accompanied by an average humidity level of 84%. Embrace the variety that this month has to offer!
In December in Swift Trail Junction, the average temperature is 8°C (47°F). Maximums can reach 23°C (73°F) and minimums can be as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures, packing layers to ensure comfort during their visit.
In Swift Trail Junction in December, the precipitation amount is 29 mm (1.1 in) over a span of 4 days.
In Swift Trail Junction in December, humidity is 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.
In Swift Trail Junction 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 Swift Trail Junction for better planning.
UV Risk Categories
Weather in Swift Trail Junction varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Swift Trail Junction, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (46°F) | 30 mm (1.2 inches) | 81% | moderate |
| February Weather | 9°C (49°F) | 38 mm (1.5 inches) | 82% | high |
| March Weather | 13°C (56°F) | 24 mm (1.0 inches) | 68% | very high |
| April Weather | 19°C (66°F) | 3 mm (0.1 inches) | 55% | extreme |
| May Weather | 23°C (73°F) | 4 mm (0.2 inches) | 45% | extreme |
| June Weather | 28°C (83°F) | 6 mm (0.2 inches) | 37% | extreme |
| July Weather | 28°C (83°F) | 54 mm (2.1 inches) | 43% | extreme |
| August Weather | 28°C (82°F) | 32 mm (1.3 inches) | 53% | extreme |
| September Weather | 25°C (77°F) | 38 mm (1.5 inches) | 66% | extreme |
| October Weather | 19°C (66°F) | 19 mm (0.8 inches) | 72% | very high |
| November Weather | 14°C (57°F) | 21 mm (0.8 inches) | 81% | high |
| December Weather | 8°C (47°F) | 29 mm (1.1 inches) | 84% | moderate |