Last updated: June 24, 2025
In December, the average temperature in Crestline, United States hovers around 1°C (35°F). Expect chilly days, with minimum temperatures dropping to -20°C (-4°F) and maximums reaching up to 17°C (63°F). This month witnesses an average precipitation of 91 mm (3.6 in) spread over 11 days, while humidity levels linger around a moist 86%.
In December in Crestline, the average temperature is 1°C (35°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -20°C (-4°F). Be prepared for a wide range of temperatures and pack accordingly for your travels to Crestline during this month.
In Crestline in December, the precipitation amount is 91 mm (3.6 in) over a period of 11 days.
In Crestline in December, humidity is 86%. With an average temperature of 1°C (35°F), this humidity feels like a biting chill that wraps around you, making outdoor exploration uncomfortable and requiring extra layers to stay warm while navigating the damp air.
In Crestline 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 Crestline, you can visit Hourly UV Index in Crestline.
UV Risk Categories
Weather in Crestline varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Crestline, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 82 mm (3.2 inches) | 88% | moderate |
| February Weather | 0°C (32°F) | 102 mm (4.0 inches) | 87% | moderate |
| March Weather | 5°C (40°F) | 103 mm (4.1 inches) | 87% | high |
| April Weather | 10°C (50°F) | 126 mm (5.0 inches) | 87% | very high |
| May Weather | 17°C (62°F) | 129 mm (5.1 inches) | 81% | very high |
| June Weather | 21°C (71°F) | 146 mm (5.7 inches) | 82% | very high |
| July Weather | 23°C (74°F) | 124 mm (4.9 inches) | 81% | very high |
| August Weather | 22°C (72°F) | 81 mm (3.2 inches) | 78% | very high |
| September Weather | 20°C (67°F) | 79 mm (3.1 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 98 mm (3.9 inches) | 82% | high |
| November Weather | 5°C (41°F) | 96 mm (3.8 inches) | 89% | moderate |
| December Weather | 1°C (35°F) | 91 mm (3.6 inches) | 86% | low |