Last updated: August 27, 2025
In December, the average temperature in San Ignacio, Mexico is a mild 13°C (55°F). However, be prepared for a range that can dip to a chilly -3°C (27°F) or rise to a warm 30°C (85°F). On average, you'll encounter 14 mm (0.6 in) of precipitation over just 1 day, accompanied by a high humidity level of 87%.
In December in San Ignacio, the average temperature is 13°C (55°F). Maximums can reach 30°C (85°F) and minimums can be as low as -3°C (27°F). When traveling during this time, it's advisable to pack layers to accommodate the wide range of temperatures.
In San Ignacio in December, the precipitation amount is 14 mm (0.6 in) over the course of 1 day.
In San Ignacio in December, humidity is 87%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making travel sluggish and slightly uncomfortable, as each step seems to cling to the damp air.
In San Ignacio 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 Ignacio, you can refer to this Hourly UV Index in San Ignacio.
UV Risk Categories
Weather in San Ignacio varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Ignacio, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (55°F) | 5 mm (0.2 inches) | 75% | high |
| February Weather | 16°C (61°F) | 4 mm (0.2 inches) | 65% | very high |
| March Weather | 20°C (69°F) | 3 mm (0.1 inches) | 58% | extreme |
| April Weather | 24°C (76°F) | 2 mm (0.1 inches) | 48% | extreme |
| May Weather | 28°C (83°F) | 4 mm (0.2 inches) | 48% | extreme |
| June Weather | 30°C (87°F) | 14 mm (0.5 inches) | 54% | extreme |
| July Weather | 28°C (83°F) | 50 mm (2.0 inches) | 72% | extreme |
| August Weather | 28°C (83°F) | 50 mm (1.9 inches) | 77% | extreme |
| September Weather | 25°C (78°F) | 73 mm (2.9 inches) | 86% | extreme |
| October Weather | 23°C (73°F) | 15 mm (0.6 inches) | 82% | very high |
| November Weather | 18°C (64°F) | 11 mm (0.4 inches) | 85% | very high |
| December Weather | 13°C (55°F) | 14 mm (0.6 inches) | 87% | high |