Last updated: August 26, 2025
In San Juan Atzingo, Mexico, the average temperature in September hovers around 20°C (68°F). Expect a pleasant range, with minimums of 12°C (53°F) and maximums reaching up to 30°C (87°F). However, be prepared for 145 mm (5.7 in) of precipitation spread over 16 days, contributing to an average humidity of 82%. It's a month that calls for both sun and rain gear!
In September in San Juan Atzingo, the average temperature is 20°C (68°F). Maximum temperatures can reach 30°C (87°F), while minimum temperatures can drop to as low as 12°C (53°F). This mild climate makes it an ideal time to explore the beautiful surroundings and enjoy outdoor activities.
In San Juan Atzingo in September, the precipitation amount is 145 mm (5.7 in) spread over 16 days, indicating a moderately wet period for the region.
In San Juan Atzingo in September humidity is 82%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit sluggish but surprisingly refreshing, as long as you take breaks in shaded areas to cool off.
In San Juan Atzingo in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Juan Atzingo, you can check here.
UV Risk Categories
Weather in San Juan Atzingo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Juan Atzingo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (60°F) | 5 mm (0.2 inches) | 84% | very high |
| February Weather | 18°C (64°F) | 4 mm (0.1 inches) | 78% | extreme |
| March Weather | 19°C (66°F) | 11 mm (0.4 inches) | 75% | extreme |
| April Weather | 21°C (70°F) | 34 mm (1.3 inches) | 70% | extreme |
| May Weather | 22°C (71°F) | 83 mm (3.3 inches) | 77% | extreme |
| June Weather | 20°C (68°F) | 160 mm (6.3 inches) | 76% | extreme |
| July Weather | 20°C (68°F) | 63 mm (2.5 inches) | 68% | extreme |
| August Weather | 20°C (69°F) | 89 mm (3.5 inches) | 70% | extreme |
| September Weather | 20°C (68°F) | 145 mm (5.7 inches) | 82% | extreme |
| October Weather | 19°C (67°F) | 62 mm (2.4 inches) | 91% | extreme |
| November Weather | 17°C (63°F) | 11 mm (0.4 inches) | 89% | very high |
| December Weather | 16°C (61°F) | 3 mm (0.1 inches) | 88% | very high |