Guanajuato weather in September
September in Guanajuato: warm, rainy, with clean air — an excellent time to visit.
#7 of 12 months in Guanajuato · #42 of 604 destinations to visit in September · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Guanajuato climate normals — September
| Daytime high | 25°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 104 mm / 4.1 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.3 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Guanajuato?
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Guanajuato in September — FAQ
- Is September a good time to visit Guanajuato?
- September in Guanajuato: warm, rainy, with clean air — an excellent time to visit. It ranks #7 of 12 months for Guanajuato on SeasonMap's comfort score (91/100).
- What is the weather like in Guanajuato in September?
- In September, Guanajuato averages a daily high of 24.7°C and a low of 14°C, with about 103.5 mm of rain over roughly 11 rainy days.
- What is the air quality in Guanajuato in September?
- Guanajuato has a mean US Air Quality Index of about 34 in September.