Last updated: June 24, 2025
In December, the average temperature in Fillmore, United States hovers around -1°C (30°F), with a minimum dipping to -21°C (-6°F) and a maximum reaching up to 16°C (61°F). Expect 94 mm (3.7 in) of precipitation spread over 16 days, contributing to a notable average humidity of 87%. Be prepared for chilly and damp conditions!
In December in Fillmore, the average temperature is -1°C (30°F). Maximum temperatures can reach 16°C (61°F), while minimums can drop as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Fillmore in December, the precipitation amount is 94 mm (3.7 in) over a span of 16 days.
In Fillmore in December, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.
In Fillmore 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 Fillmore, you can visit Hourly UV Index in Fillmore.
UV Risk Categories
Weather in Fillmore varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fillmore, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 80 mm (3.2 inches) | 91% | moderate |
| February Weather | -3°C (27°F) | 90 mm (3.6 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 79 mm (3.1 inches) | 88% | high |
| April Weather | 7°C (44°F) | 112 mm (4.4 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 117 mm (4.6 inches) | 82% | very high |
| June Weather | 18°C (65°F) | 100 mm (3.9 inches) | 79% | very high |
| July Weather | 21°C (70°F) | 133 mm (5.2 inches) | 77% | very high |
| August Weather | 20°C (68°F) | 95 mm (3.8 inches) | 72% | very high |
| September Weather | 17°C (62°F) | 75 mm (2.9 inches) | 76% | very high |
| October Weather | 11°C (52°F) | 134 mm (5.3 inches) | 83% | high |
| November Weather | 3°C (37°F) | 91 mm (3.6 inches) | 88% | moderate |
| December Weather | -1°C (30°F) | 94 mm (3.7 inches) | 87% | low |