Last updated: June 24, 2025
In December, the average temperature in Rancho Santa Fe, United States hovers around 14°C (57°F), with a comfortable range from a minimum of 6°C (43°F) to a maximum of 25°C (77°F). Expect 73 mm (2.9 in) of precipitation over approximately 6 days, paired with an average humidity level of 74%. Get ready for a mix of mild weather and occasional showers!
In December in Rancho Santa Fe, the average temperature is 14°C (57°F), with maximums reaching 25°C (77°F) and minimums dropping as low as 6°C (43°F). This mild climate makes it an ideal time for sightseeing and outdoor activities.
In Rancho Santa Fe in December, the precipitation amount is 73 mm (2.9 in) over a span of 6 days.
In Rancho Santa Fe in December, humidity is 74%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making it slightly uncomfortable for traveling, as you may find yourself quickly sweating and in need of frequent breaks to cool down.
In Rancho Santa Fe 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 Rancho Santa Fe for better planning.
UV Risk Categories
Weather in Rancho Santa Fe varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rancho Santa Fe, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (57°F) | 67 mm (2.6 inches) | 72% | moderate |
| February Weather | 13°C (56°F) | 72 mm (2.8 inches) | 77% | high |
| March Weather | 14°C (58°F) | 64 mm (2.5 inches) | 67% | very high |
| April Weather | 16°C (61°F) | 30 mm (1.2 inches) | 56% | very high |
| May Weather | 17°C (62°F) | 23 mm (0.9 inches) | 46% | extreme |
| June Weather | 18°C (65°F) | 4 mm (0.2 inches) | 48% | extreme |
| July Weather | 21°C (70°F) | 2 mm (0.1 inches) | 46% | extreme |
| August Weather | 22°C (72°F) | 2 mm (0.1 inches) | 42% | very high |
| September Weather | 21°C (71°F) | 5 mm (0.2 inches) | 52% | very high |
| October Weather | 20°C (68°F) | 13 mm (0.5 inches) | 58% | high |
| November Weather | 17°C (62°F) | 34 mm (1.3 inches) | 66% | moderate |
| December Weather | 14°C (57°F) | 73 mm (2.9 inches) | 74% | moderate |