Last updated: June 24, 2025
In December, the average temperature in Ventura, United States hovers around -3°C (27°F). However, temperatures can vary significantly, dipping to a chilling -23°C (-10°F) at their lowest and occasionally reaching a mild 20°C (68°F). Expect some precipitation with an average of 36 mm (1.4 in) spread over 5 days, while the air remains quite humid with an average humidity level of 83%.
In December in Ventura, the average temperature is -3°C (27°F), with maximums reaching 20°C (68°F) and minimums plummeting as low as -23°C (-10°F). Be prepared for a wide temperature range, packing both warm clothing and some lighter layers for your travels.
In Ventura in December, the precipitation amount is 36 mm (1.4 in) over the course of 5 days.
In Ventura in December humidity is 83%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that wraps around you, making every breath feel heavy and the air almost damp with cold. Traveling in such conditions can be quite challenging, as the moisture in the air makes the cold penetrate deeper, making it essential to dress warmly and stay active to ward off the chill.
In Ventura in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Ventura, you can check the information here.
UV Risk Categories
Weather in Ventura varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ventura, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (19°F) | 36 mm (1.4 inches) | 82% | moderate |
| February Weather | -8°C (18°F) | 47 mm (1.9 inches) | 84% | moderate |
| March Weather | 1°C (35°F) | 72 mm (2.9 inches) | 80% | moderate |
| April Weather | 7°C (45°F) | 83 mm (3.3 inches) | 81% | very high |
| May Weather | 15°C (60°F) | 159 mm (6.2 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 133 mm (5.2 inches) | 80% | extreme |
| July Weather | 23°C (74°F) | 102 mm (4.0 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 121 mm (4.8 inches) | 77% | very high |
| September Weather | 18°C (65°F) | 105 mm (4.1 inches) | 75% | very high |
| October Weather | 10°C (49°F) | 110 mm (4.3 inches) | 80% | moderate |
| November Weather | 2°C (35°F) | 47 mm (1.9 inches) | 87% | moderate |
| December Weather | -3°C (27°F) | 36 mm (1.4 inches) | 83% | moderate |