San Miguel de Allende weather in September
September in San Miguel de Allende: warm, rainy, with clean air — an excellent time to visit.
#7 of 12 months in San Miguel de Allende · #84 of 897 destinations to visit in September · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on San Miguel de Allende in September
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San Miguel de Allende climate normals — September
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Rainfall | 86 mm / 3.4 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 12.3 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Miguel de Allende in September — FAQ
- Is September a good time to visit San Miguel de Allende?
- September in San Miguel de Allende: warm, rainy, with clean air — an excellent time to visit. It ranks #7 of 12 months for San Miguel de Allende on SeasonMap's comfort score (93/100).
- What is the weather like in San Miguel de Allende in September?
- In September, San Miguel de Allende averages a daily high of 25.1°C and a low of 14.6°C, with about 85.5 mm of rain over roughly 8.6 rainy days.
- What is the air quality in San Miguel de Allende in September?
- San Miguel de Allende has a mean US Air Quality Index of about 38 in September.