Last updated: August 27, 2025
In December, the average temperature in Santa Rosa, Mexico hovers around 11°C (52°F), with extremes ranging from a chilly -8°C (18°F) to a warm 25°C (78°F). Expect a relatively low precipitation amount, averaging just 12 mm (0.5 in) spread over 1 day during the month. With an average humidity of 83%, this climate promises a uniquely refreshing experience!
In December in Santa Rosa, the average temperature is 11°C (52°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -8°C (18°F). This unpredictable weather makes it essential for travelers to pack layers to adapt to the varying conditions.
In Santa Rosa in December, the precipitation amount is 12 mm (0.5 in) over the course of 1 day.
In Santa Rosa in December humidity is 83%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leading travelers to seek shelter indoors or to dress in layered clothing to stay warm while exploring the area.
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 | 11°C (52°F) | 17 mm (0.7 inches) | 71% | very high |
| February Weather | 13°C (56°F) | 11 mm (0.4 inches) | 64% | extreme |
| March Weather | 16°C (62°F) | 6 mm (0.2 inches) | 49% | extreme |
| April Weather | 18°C (65°F) | 5 mm (0.2 inches) | 47% | extreme |
| May Weather | 20°C (69°F) | 19 mm (0.8 inches) | 55% | extreme |
| June Weather | 20°C (69°F) | 94 mm (3.7 inches) | 77% | extreme |
| July Weather | 18°C (65°F) | 182 mm (7.2 inches) | 82% | extreme |
| August Weather | 19°C (66°F) | 100 mm (3.9 inches) | 83% | extreme |
| September Weather | 17°C (63°F) | 141 mm (5.6 inches) | 86% | extreme |
| October Weather | 16°C (61°F) | 55 mm (2.1 inches) | 83% | extreme |
| November Weather | 14°C (57°F) | 17 mm (0.7 inches) | 80% | very high |
| December Weather | 11°C (52°F) | 12 mm (0.5 inches) | 83% | very high |