Mendoza weather in September
September in Mendoza: nice, dry, with clean air — an excellent time to visit.
#7 of 12 months in Mendoza · #96 of 604 destinations to visit in September · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Mendoza climate normals — September
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 7°C / 44°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 13 mm / 0.5 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 46% | 🍃 comfortable |
| Dew point | 0°C / 32°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 11.9 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Mendoza?
Loading map…
Mendoza in September — FAQ
- Is September a good time to visit Mendoza?
- September in Mendoza: nice, dry, with clean air — an excellent time to visit. It ranks #7 of 12 months for Mendoza on SeasonMap's comfort score (89/100).
- What is the weather like in Mendoza in September?
- In September, Mendoza averages a daily high of 20.1°C and a low of 6.5°C, with about 12.5 mm of rain over roughly 3.4 rainy days.
- What is the air quality in Mendoza in September?
- Mendoza has a mean US Air Quality Index of about 31 in September.