Last updated: June 24, 2025
In December, the average temperature in Santa Anna, United States hovers around 11°C (51°F). Expect a range where the minimum dips to -5°C (23°F) and the maximum peaks at 31°C (89°F). During this period, you'll experience 39 mm (1.5 in) of precipitation over approximately 4 days, accompanied by a high average humidity of 87%.
In December in Santa Anna, the average temperature is 11°C (51°F). Maximum can reach 31°C (89°F) and minimum can be as low as -5°C (23°F). It's important to pack layers and be prepared for varying weather conditions while traveling.
In Santa Anna in December, the precipitation amount is 39 mm (1.5 in) spread over a period of 4 days.
In Santa Anna in December humidity is 87%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill wrapping around you, making outdoor excursions a bit uncomfortable as the air feels thick and heavy, urging you to seek shelter more often than not.
In Santa Anna in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Santa Anna for better planning.
UV Risk Categories
Weather in Santa Anna varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Anna, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (47°F) | 32 mm (1.3 inches) | 78% | moderate |
| February Weather | 10°C (50°F) | 38 mm (1.5 inches) | 78% | high |
| March Weather | 16°C (61°F) | 71 mm (2.8 inches) | 77% | very high |
| April Weather | 19°C (67°F) | 63 mm (2.5 inches) | 78% | extreme |
| May Weather | 24°C (75°F) | 107 mm (4.2 inches) | 82% | extreme |
| June Weather | 28°C (82°F) | 46 mm (1.8 inches) | 78% | extreme |
| July Weather | 30°C (86°F) | 25 mm (1.0 inches) | 69% | extreme |
| August Weather | 29°C (85°F) | 44 mm (1.7 inches) | 63% | extreme |
| September Weather | 26°C (79°F) | 68 mm (2.7 inches) | 66% | very high |
| October Weather | 20°C (68°F) | 73 mm (2.9 inches) | 73% | very high |
| November Weather | 14°C (57°F) | 32 mm (1.2 inches) | 84% | high |
| December Weather | 11°C (51°F) | 39 mm (1.5 inches) | 87% | moderate |