Last updated: June 24, 2025
In December, the average temperature in Grants Pass, United States hovers around 3°C (38°F), with a chilly minimum of -7°C (19°F) and a pleasantly mild maximum of 17°C (62°F). Be prepared for 116 mm (4.6 in) of precipitation spread over about 14 days, contributing to an average humidity of a damp 87%.
In December in Grants Pass, the average temperature is 3°C (38°F), with maximums reaching up to 17°C (62°F) and minimums dropping as low as -7°C (19°F). It's advisable to prepare for a range of temperatures to ensure a comfortable and enjoyable travel experience.
In Grants Pass in December, the total precipitation amount is 116 mm (4.6 in) spread over a duration of 14 days.
In Grants Pass 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 Grants Pass 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 Grants Pass, you can visit Hourly UV Index in Grants Pass.
UV Risk Categories
Weather in Grants Pass varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grants Pass, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 138 mm (5.4 inches) | 84% | moderate |
| February Weather | 4°C (40°F) | 151 mm (5.9 inches) | 85% | moderate |
| March Weather | 7°C (44°F) | 103 mm (4.0 inches) | 86% | high |
| April Weather | 10°C (50°F) | 88 mm (3.5 inches) | 83% | very high |
| May Weather | 14°C (57°F) | 48 mm (1.9 inches) | 83% | very high |
| June Weather | 18°C (65°F) | 19 mm (0.7 inches) | 83% | extreme |
| July Weather | 22°C (71°F) | 1 mm (0.0 inches) | 78% | very high |
| August Weather | 22°C (71°F) | 5 mm (0.2 inches) | 67% | very high |
| September Weather | 18°C (64°F) | 36 mm (1.4 inches) | 66% | very high |
| October Weather | 12°C (53°F) | 41 mm (1.6 inches) | 77% | high |
| November Weather | 7°C (44°F) | 86 mm (3.4 inches) | 87% | moderate |
| December Weather | 3°C (38°F) | 116 mm (4.6 inches) | 87% | low |