Last updated: March 2, 2024
The weather in San Guillermo la Reforma, Mexico, during September is characterized by an average temperature of 16°C (61°F). Highs can soar to 25°C (77°F), while lows may dip to 8°C (47°F). Typically, the humidity level in San Guillermo la Reforma throughout September hovers around 82%.
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In September, San Guillermo la Reforma averages 144 mm (5.7 inches) of rainfall, typically over the course of 21 rainy days. The month enjoys an average of 12 hours 13 minutes of daylight, with the sun shining for approximately 8 hours 36 minutes each day. Additionally, there is a 14% probability of sunny days during this period.
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In September, the UV Index in San Guillermo la Reforma reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 0 | 1 | 2 | 5 | 9 | 12 | 14 | 14 | 12 | 8 | 5 | 2 | 1 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 30 min | 45 min | ||||||