Last updated: June 24, 2025
In December, the average temperature in Roseville, United States hovers around 1°C (34°F), presenting a chilly climate. Visitors should be prepared for extremes, as temperatures can plunge to a minimum of -21°C (-6°F) or soar to a maximum of 22°C (72°F). Expect a modest precipitation level of 48 mm (1.9 in) spread over 5 days, and with an average humidity of 84%, the air will feel quite damp.
In December in Roseville, the average temperature is 1°C (34°F). The maximum can reach 22°C (72°F) and the minimum can be as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Roseville in December, the precipitation amount is 48 mm (1.9 in) spread over the course of 5 days.
In Roseville in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.
In Roseville 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 Roseville, you can visit Hourly UV Index in Roseville.
UV Risk Categories
Weather in Roseville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Roseville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 58 mm (2.3 inches) | 81% | moderate |
| February Weather | -2°C (29°F) | 62 mm (2.5 inches) | 81% | moderate |
| March Weather | 5°C (42°F) | 110 mm (4.3 inches) | 81% | high |
| April Weather | 10°C (51°F) | 102 mm (4.0 inches) | 82% | very high |
| May Weather | 18°C (64°F) | 170 mm (6.7 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 141 mm (5.6 inches) | 81% | extreme |
| July Weather | 25°C (78°F) | 96 mm (3.8 inches) | 79% | very high |
| August Weather | 24°C (75°F) | 80 mm (3.1 inches) | 77% | very high |
| September Weather | 21°C (70°F) | 96 mm (3.8 inches) | 78% | very high |
| October Weather | 13°C (55°F) | 119 mm (4.7 inches) | 78% | high |
| November Weather | 4°C (40°F) | 51 mm (2.0 inches) | 87% | moderate |
| December Weather | 1°C (34°F) | 48 mm (1.9 inches) | 84% | low |