Last updated: August 27, 2025
In December, the average temperature in San Jacinto, Mexico is a pleasant 15°C (60°F), with a range that can dip as low as -2°C (28°F) or rise to a warm 30°C (87°F). You can expect 13 mm (0.5 in) of precipitation spread over about 2 days, contributing to an average humidity of 84%. Enjoy the varied weather while exploring this charming destination!
In December in San Jacinto, the average temperature is 15°C (60°F). The maximum can reach 30°C (87°F) and the minimum can be as low as -2°C (28°F). This variation makes it essential for travelers to pack layers to adapt to changing temperatures throughout the day.
In San Jacinto in December, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.
In San Jacinto in December humidity is 84%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making outdoor exploration feel stifling and sticky, while creating a heavy air that may slow your pace and dampen your enthusiasm for sightseeing.
In San Jacinto in December, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in San Jacinto.
UV Risk Categories
Weather in San Jacinto varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Jacinto, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 15°C (59°F) | 6 mm (0.2 inches) | 70% | high |
| February Weather | 18°C (65°F) | 6 mm (0.2 inches) | 62% | very high |
| March Weather | 21°C (71°F) | 9 mm (0.3 inches) | 53% | extreme |
| April Weather | 25°C (77°F) | 3 mm (0.1 inches) | 48% | extreme |
| May Weather | 28°C (82°F) | 7 mm (0.3 inches) | 52% | extreme |
| June Weather | 28°C (83°F) | 24 mm (0.9 inches) | 64% | extreme |
| July Weather | 27°C (81°F) | 49 mm (1.9 inches) | 73% | extreme |
| August Weather | 27°C (81°F) | 32 mm (1.2 inches) | 71% | extreme |
| September Weather | 25°C (76°F) | 61 mm (2.4 inches) | 82% | extreme |
| October Weather | 23°C (73°F) | 37 mm (1.4 inches) | 83% | extreme |
| November Weather | 19°C (66°F) | 6 mm (0.2 inches) | 82% | very high |
| December Weather | 15°C (60°F) | 13 mm (0.5 inches) | 84% | high |