Last updated: August 27, 2025
In December, the average temperature in San Isidro, Mexico hovers around 16°C (60°F), providing a pleasant climate for outdoor activities. Expect a minimum chill of -3°C (27°F) and a peak warmth reaching 31°C (88°F). With 12 mm (0.5 in) of precipitation spread over 2 days, the air carries a refreshing 84% humidity, ideal for vibrant flora.
In December in San Isidro, the average temperature is 16°C (60°F). Maximums can reach 31°C (88°F), while minimums can drop to as low as -3°C (27°F). Be prepared for a wide range of temperatures if you're planning to travel during this month.
In San Isidro in December, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.
In San Isidro in December humidity is 84%. With an average temperature of 16°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities feel muggy and potentially exhausting for travelers.
In San Isidro 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 Isidro.
UV Risk Categories
Weather in San Isidro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Isidro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 15°C (59°F) | 7 mm (0.3 inches) | 70% | high |
| February Weather | 18°C (66°F) | 7 mm (0.3 inches) | 62% | very high |
| March Weather | 22°C (71°F) | 9 mm (0.3 inches) | 53% | extreme |
| April Weather | 25°C (77°F) | 5 mm (0.2 inches) | 48% | extreme |
| May Weather | 28°C (82°F) | 11 mm (0.4 inches) | 52% | extreme |
| June Weather | 28°C (83°F) | 27 mm (1.1 inches) | 64% | extreme |
| July Weather | 27°C (80°F) | 82 mm (3.2 inches) | 73% | extreme |
| August Weather | 27°C (81°F) | 39 mm (1.5 inches) | 71% | extreme |
| September Weather | 24°C (76°F) | 91 mm (3.6 inches) | 82% | extreme |
| October Weather | 23°C (73°F) | 40 mm (1.6 inches) | 83% | extreme |
| November Weather | 19°C (66°F) | 7 mm (0.3 inches) | 82% | very high |
| December Weather | 16°C (60°F) | 12 mm (0.5 inches) | 84% | high |