Last updated: August 27, 2025
In Primero de Mayo, Mexico, the average temperature in December hovers around 20°C (68°F), with extremes ranging from a brisk 2°C (37°F) to a sweltering 36°C (97°F). Expect some rain, with an average precipitation of 12 mm (0.5 in) over about 3 days. The air tends to be quite humid, boasting an average humidity level of 89%.
In December in Primero de Mayo, the average temperature is 20°C (68°F). Maximums can reach 36°C (97°F), while minimums can dip as low as 2°C (37°F). Travelers should be prepared for warm days and cool nights, making layered clothing a wise choice.
In Primero de Mayo in December, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.
In Primero de Mayo in December, humidity is 89%. With an average temperature of 20°C (68°F), this humidity feels like walking through a warm, damp blanket that clings to your skin, making each step feel heavier and the air thick with moisture, which can be quite uncomfortable for traveling.
In Primero de Mayo 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 Primero de Mayo.
UV Risk Categories
Weather in Primero de Mayo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Primero de Mayo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 19°C (66°F) | 19 mm (0.8 inches) | 87% | high |
| February Weather | 21°C (70°F) | 12 mm (0.5 inches) | 85% | very high |
| March Weather | 24°C (75°F) | 29 mm (1.2 inches) | 83% | extreme |
| April Weather | 27°C (81°F) | 23 mm (0.9 inches) | 84% | extreme |
| May Weather | 29°C (85°F) | 61 mm (2.4 inches) | 85% | extreme |
| June Weather | 29°C (85°F) | 91 mm (3.6 inches) | 79% | extreme |
| July Weather | 29°C (85°F) | 92 mm (3.6 inches) | 71% | extreme |
| August Weather | 30°C (85°F) | 58 mm (2.3 inches) | 72% | extreme |
| September Weather | 28°C (84°F) | 70 mm (2.8 inches) | 80% | extreme |
| October Weather | 26°C (79°F) | 61 mm (2.4 inches) | 85% | extreme |
| November Weather | 22°C (72°F) | 13 mm (0.5 inches) | 88% | very high |
| December Weather | 20°C (68°F) | 12 mm (0.5 inches) | 89% | high |