Last updated: August 27, 2025
In December, the average temperature in Santa Rosa, Mexico hovers around 13°C (55°F). However, be prepared for a wide range: temperatures can drop as low as -3°C (26°F) or soar to a warm 27°C (81°F). Expect about 7 mm (0.3 in) of precipitation over 1 day, and with an average humidity of 81%, the air can feel quite moist.
In December in Santa Rosa, the average temperature is 13°C (55°F). Maximum temperatures can reach 27°C (81°F), while the minimum can drop as low as -3°C (26°F). It's a great time to experience the varied weather, so be sure to pack accordingly for your travels.
In Santa Rosa in December, the precipitation amount is 7 mm (0.3 in) over the course of 1 day.
In Santa Rosa in December, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.
In Santa Rosa in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Santa Rosa.
UV Risk Categories
Weather in Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (55°F) | 7 mm (0.3 inches) | 74% | very high |
| February Weather | 15°C (60°F) | 10 mm (0.4 inches) | 65% | extreme |
| March Weather | 18°C (64°F) | 14 mm (0.5 inches) | 58% | extreme |
| April Weather | 20°C (68°F) | 9 mm (0.4 inches) | 58% | extreme |
| May Weather | 21°C (71°F) | 45 mm (1.8 inches) | 67% | extreme |
| June Weather | 20°C (68°F) | 120 mm (4.7 inches) | 76% | extreme |
| July Weather | 19°C (67°F) | 106 mm (4.2 inches) | 67% | extreme |
| August Weather | 20°C (67°F) | 77 mm (3.0 inches) | 68% | extreme |
| September Weather | 18°C (65°F) | 121 mm (4.8 inches) | 81% | extreme |
| October Weather | 17°C (63°F) | 63 mm (2.5 inches) | 83% | extreme |
| November Weather | 15°C (58°F) | 23 mm (0.9 inches) | 84% | very high |
| December Weather | 13°C (55°F) | 7 mm (0.3 inches) | 81% | very high |