Last updated: March 2, 2024
The weather in San Antonio, Mexico, during September is characterized by an average temperature of 18°C (65°F). Highs can soar to 28°C (83°F), while lows may dip to 10°C (51°F). Typically, the humidity level in San Antonio throughout September hovers around 81%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, San Antonio averages 121 mm (4.8 inches) of rainfall, typically over the course of 17 rainy days. The month enjoys an average of 12 hours 13 minutes of daylight, with the sun shining for approximately 9 hours 32 minutes each day. Additionally, there is a 19% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In September, the UV Index in San Antonio reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 14:00 and 16:00, 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 | 4 | 8 | 11 | 13 | 14 | 12 | 9 | 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 | ||||||