Last updated: June 24, 2025
In December, the average temperature in Mexico, United States hovers around -5°C (23°F), with extremes ranging from a chilly -27°C (-16°F) to a milder 14°C (58°F). Expect about 120 mm (4.7 in) of precipitation over 10 days, and prepare for a high average humidity of 85%. This month promises a mix of icy conditions and damp air, perfect for those who love a wintery atmosphere!
In December in Mexico, the average temperature is -5°C (23°F), with maximums reaching up to 14°C (58°F) and minimums plummeting as low as -27°C (-16°F). Be prepared for a wide range of temperatures if you plan to travel during this time.
In Mexico in December, the precipitation amount is 120 mm (4.7 in) spread over a duration of 10 days.
In Mexico in December, humidity is 85%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that clings to your skin, making even the briefest outdoor excursions feel daunting and uncomfortable.
In Mexico in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Mexico, you can visit Hourly UV Index in Mexico.
UV Risk Categories
Weather in Mexico varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mexico, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 83 mm (3.3 inches) | 91% | low |
| February Weather | -6°C (21°F) | 86 mm (3.4 inches) | 89% | moderate |
| March Weather | -2°C (29°F) | 72 mm (2.8 inches) | 85% | moderate |
| April Weather | 5°C (41°F) | 128 mm (5.0 inches) | 84% | very high |
| May Weather | 12°C (54°F) | 87 mm (3.4 inches) | 78% | very high |
| June Weather | 17°C (64°F) | 84 mm (3.3 inches) | 72% | very high |
| July Weather | 20°C (69°F) | 133 mm (5.2 inches) | 75% | very high |
| August Weather | 19°C (67°F) | 90 mm (3.5 inches) | 74% | very high |
| September Weather | 15°C (60°F) | 64 mm (2.5 inches) | 77% | high |
| October Weather | 9°C (48°F) | 128 mm (5.0 inches) | 85% | moderate |
| November Weather | 1°C (34°F) | 107 mm (4.2 inches) | 86% | moderate |
| December Weather | -5°C (23°F) | 120 mm (4.7 inches) | 85% | low |