Last updated: June 24, 2025
In December, the average temperature in Cave Junction, United States is a brisk 3°C (38°F). Expect a chilly minimum of -10°C (14°F) and a pleasant maximum reaching 18°C (65°F). With an average precipitation of 198 mm (7.8 in) over 13 days, it’s wise to carry an umbrella. The humidity hangs high at 87%, adding to the month’s cool and damp atmosphere.
In December in Cave Junction, the average temperature is 3°C (38°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -10°C (14°F). It's advisable to pack warm clothing and prepare for chilly weather if you're planning to travel during this time.
In Cave Junction in December, the total precipitation amount is 198 mm (7.8 in), occurring over a span of 13 days.
In Cave Junction in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Cave Junction 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 Cave Junction, you can visit Hourly UV Index in Cave Junction.
UV Risk Categories
Weather in Cave Junction varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cave Junction, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 246 mm (9.7 inches) | 84% | moderate |
| February Weather | 4°C (39°F) | 246 mm (9.7 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 179 mm (7.1 inches) | 86% | high |
| April Weather | 9°C (48°F) | 136 mm (5.4 inches) | 83% | very high |
| May Weather | 13°C (55°F) | 66 mm (2.6 inches) | 83% | extreme |
| June Weather | 17°C (63°F) | 30 mm (1.2 inches) | 83% | extreme |
| July Weather | 21°C (71°F) | 2 mm (0.1 inches) | 78% | very high |
| August Weather | 21°C (70°F) | 5 mm (0.2 inches) | 67% | very high |
| September Weather | 17°C (63°F) | 45 mm (1.8 inches) | 66% | very high |
| October Weather | 11°C (53°F) | 71 mm (2.8 inches) | 77% | high |
| November Weather | 7°C (45°F) | 168 mm (6.6 inches) | 87% | moderate |
| December Weather | 3°C (38°F) | 198 mm (7.8 inches) | 87% | low |