Last updated: June 24, 2025
In West Linn, United States, the average temperature in December hovers around 5°C (40°F). Expect a chilly minimum of -7°C (19°F) and a mild maximum of 16°C (62°F). This month typically sees 212 mm (8.3 in) of precipitation spread over 21 days, coupled with a high average humidity of 87%. Prepare for a mix of brisk air and wet weather!
In December in West Linn, the average temperature is 5°C (40°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -7°C (19°F). It's advisable to dress in layers to prepare for the chilly weather and enjoy your travels.
In West Linn in December, the precipitation amount is 212 mm (8.3 in) over the course of 21 days.
In West Linn in December, humidity is 87%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that wraps around you, making outdoor excursions less enjoyable and requiring extra layers to stay comfortable while exploring.
In West Linn 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 West Linn, you can visit Hourly UV Index in West Linn.
UV Risk Categories
Weather in West Linn varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in West Linn, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 176 mm (6.9 inches) | 85% | low |
| February Weather | 4°C (40°F) | 219 mm (8.6 inches) | 84% | moderate |
| March Weather | 7°C (44°F) | 154 mm (6.0 inches) | 85% | high |
| April Weather | 10°C (50°F) | 140 mm (5.5 inches) | 83% | high |
| May Weather | 13°C (56°F) | 70 mm (2.7 inches) | 83% | very high |
| June Weather | 17°C (63°F) | 57 mm (2.2 inches) | 83% | very high |
| July Weather | 20°C (68°F) | 7 mm (0.3 inches) | 82% | very high |
| August Weather | 21°C (69°F) | 10 mm (0.4 inches) | 74% | very high |
| September Weather | 17°C (63°F) | 78 mm (3.1 inches) | 71% | very high |
| October Weather | 11°C (52°F) | 130 mm (5.1 inches) | 81% | moderate |
| November Weather | 7°C (45°F) | 173 mm (6.8 inches) | 87% | moderate |
| December Weather | 5°C (40°F) | 212 mm (8.3 inches) | 87% | low |