Last updated: August 27, 2025
In September, the average temperature in San Francisco Atotonilco, Mexico hovers around 18°C (64°F), making it a pleasant time to explore. Expect temperatures to range from a minimum of 8°C (47°F) to a maximum of 26°C (79°F). However, be prepared for some rain, as the area experiences about 291 mm (11.5 in) of precipitation over 27 days, and the average humidity is a notable 84%.
In September in San Francisco Atotonilco, the average temperature is 18°C (64°F). Maximums can reach 26°C (79°F), while minimums can be as low as 8°C (47°F). This comfortable climate makes San Francisco Atotonilco an ideal destination for travelers seeking mild weather and pleasant outdoor activities.
In San Francisco Atotonilco in September, the precipitation amount is 291 mm (11.5 in) during 27 days, indicating a notably wet period for the region.
In San Francisco Atotonilco in September humidity is 84%. With an average temperature of 18°C (64°F), this humidity feels like there's a heavy blanket wrapping around you, making travel feel a bit sticky and muggy, potentially leading to fatigue if you're not prepared.
In San Francisco Atotonilco in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Francisco Atotonilco.
UV Risk Categories
Weather in San Francisco Atotonilco varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Francisco Atotonilco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (53°F) | 57 mm (2.2 inches) | 88% | very high |
| February Weather | 14°C (57°F) | 50 mm (2.0 inches) | 86% | extreme |
| March Weather | 15°C (60°F) | 74 mm (2.9 inches) | 83% | extreme |
| April Weather | 17°C (63°F) | 87 mm (3.4 inches) | 80% | extreme |
| May Weather | 19°C (66°F) | 144 mm (5.7 inches) | 82% | extreme |
| June Weather | 18°C (65°F) | 247 mm (9.7 inches) | 79% | extreme |
| July Weather | 18°C (64°F) | 192 mm (7.5 inches) | 72% | extreme |
| August Weather | 18°C (64°F) | 267 mm (10.5 inches) | 74% | extreme |
| September Weather | 18°C (64°F) | 291 mm (11.5 inches) | 84% | extreme |
| October Weather | 16°C (62°F) | 250 mm (9.8 inches) | 92% | extreme |
| November Weather | 14°C (57°F) | 92 mm (3.6 inches) | 91% | very high |
| December Weather | 12°C (54°F) | 35 mm (1.4 inches) | 91% | very high |