Last updated: June 24, 2025
In Cottage Grove, United States, the average temperature in December hovers around -5°C (24°F), with extremes ranging from a chilly -26°C (-14°F) to a milder 14°C (58°F). Expect 52 mm (2.0 in) of precipitation spread over 7 days, while the air remains notably humid, with an average humidity of 84%. Stay warm and prepared for the diverse weather this month!
In December in Cottage Grove, the average temperature is -5°C (24°F). Maximums can reach 14°C (58°F), and minimums can drop as low as -26°C (-14°F). It's important to be prepared for cold weather fluctuations if you plan to visit during this time.
In Cottage Grove in December, the precipitation amount is 52 mm (2.0 in) over a duration of 7 days.
In Cottage Grove in December, humidity is 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.
In Cottage Grove 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 Cottage Grove, you can visit Hourly UV Index in Cottage Grove.
UV Risk Categories
Weather in Cottage Grove varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cottage Grove, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 31 mm (1.2 inches) | 87% | low |
| February Weather | -8°C (17°F) | 39 mm (1.5 inches) | 90% | moderate |
| March Weather | 1°C (33°F) | 61 mm (2.4 inches) | 85% | moderate |
| April Weather | 6°C (44°F) | 87 mm (3.4 inches) | 84% | high |
| May Weather | 15°C (59°F) | 143 mm (5.6 inches) | 78% | very high |
| June Weather | 22°C (71°F) | 103 mm (4.0 inches) | 80% | very high |
| July Weather | 23°C (75°F) | 108 mm (4.2 inches) | 81% | very high |
| August Weather | 21°C (71°F) | 124 mm (4.9 inches) | 81% | very high |
| September Weather | 18°C (64°F) | 118 mm (4.7 inches) | 81% | high |
| October Weather | 9°C (49°F) | 97 mm (3.8 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 38 mm (1.5 inches) | 88% | moderate |
| December Weather | -5°C (24°F) | 52 mm (2.0 inches) | 84% | low |