Last updated: August 27, 2025
In December, the average temperature in San Antonio Primero, Mexico is a mild 14°C (57°F), with temperatures ranging from a chilly -2°C (30°F) to a warm 27°C (81°F). Expect minimal rain, with only 4 mm (0.2 in) of precipitation over 0 days, and enjoy a comfortable average humidity of 81%.
In December in San Antonio Primero, the average temperature is 14°C (57°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as -2°C (30°F). This weather makes it essential to pack layers to accommodate both warm and chilly conditions while traveling.
In San Antonio Primero in December, the precipitation amount is 4 mm (0.2 in) over the course of 0 days.
In San Antonio Primero in December, humidity is 81%. With an average temperature of 14°C (57°F), this humidity feels like a warm, dense blanket that clings to your skin, making outdoor exploration a bit heavier and more tiring.
In San Antonio Primero in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Antonio Primero.
UV Risk Categories
Weather in San Antonio Primero varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Antonio Primero, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (57°F) | 4 mm (0.1 inches) | 74% | very high |
| February Weather | 16°C (61°F) | 6 mm (0.2 inches) | 65% | extreme |
| March Weather | 18°C (65°F) | 10 mm (0.4 inches) | 58% | extreme |
| April Weather | 20°C (69°F) | 12 mm (0.5 inches) | 58% | extreme |
| May Weather | 21°C (71°F) | 48 mm (1.9 inches) | 67% | extreme |
| June Weather | 20°C (68°F) | 174 mm (6.9 inches) | 76% | extreme |
| July Weather | 19°C (66°F) | 131 mm (5.2 inches) | 67% | extreme |
| August Weather | 19°C (67°F) | 109 mm (4.3 inches) | 68% | extreme |
| September Weather | 18°C (65°F) | 151 mm (5.9 inches) | 81% | extreme |
| October Weather | 17°C (63°F) | 58 mm (2.3 inches) | 83% | extreme |
| November Weather | 15°C (59°F) | 18 mm (0.7 inches) | 84% | very high |
| December Weather | 14°C (57°F) | 4 mm (0.2 inches) | 81% | very high |