Last updated: August 27, 2025
In San Isidro, Mexico, the average temperature in December hovers around 17°C (63°F). Expect a range where the minimum can drop to 2°C (36°F), while the maximum can soar to 36°C (97°F). During this month, the region experiences an average precipitation amount of 18 mm (0.7 in) across 3 days, with a high average humidity of 86%.
In December in San Isidro, the average temperature is 17°C (63°F). The maximum can reach 36°C (97°F), while the minimum can be as low as 2°C (36°F). This range makes it a great time for travelers to enjoy a variety of outdoor activities, from comfortable sightseeing to cooler evening strolls.
In San Isidro in December, the precipitation amount is 18 mm (0.7 in) over a span of 3 days.
In San Isidro in December humidity is 86%. With an average temperature of 17°C (63°F), this humidity feels like a heavy blanket wrapping around you, making the air feel thick and slightly stifling for traveling, as every step requires more effort and even a gentle breeze feels refreshing amidst the muggy atmosphere.
In San Isidro in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Isidro, you can refer to this 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 | 16°C (60°F) | 24 mm (0.9 inches) | 84% | high |
| February Weather | 18°C (65°F) | 13 mm (0.5 inches) | 83% | very high |
| March Weather | 22°C (72°F) | 26 mm (1.0 inches) | 78% | very high |
| April Weather | 25°C (77°F) | 47 mm (1.9 inches) | 81% | extreme |
| May Weather | 28°C (83°F) | 76 mm (3.0 inches) | 82% | extreme |
| June Weather | 30°C (85°F) | 106 mm (4.2 inches) | 74% | extreme |
| July Weather | 30°C (87°F) | 93 mm (3.7 inches) | 68% | extreme |
| August Weather | 31°C (88°F) | 17 mm (0.7 inches) | 67% | extreme |
| September Weather | 28°C (82°F) | 125 mm (4.9 inches) | 75% | extreme |
| October Weather | 24°C (76°F) | 50 mm (2.0 inches) | 78% | very high |
| November Weather | 20°C (67°F) | 24 mm (0.9 inches) | 83% | high |
| December Weather | 17°C (63°F) | 18 mm (0.7 inches) | 86% | high |