Puerto Iguazú weather in September
September in Puerto Iguazú: hot, rainy — a great time to visit.
#5 of 12 months in Puerto Iguazú · #382 of 604 destinations to visit in September · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Puerto Iguazú climate normals — September
| Daytime high | 28°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 95 mm / 3.7 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 57 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Puerto Iguazú in September — FAQ
- Is September a good time to visit Puerto Iguazú?
- September in Puerto Iguazú: hot, rainy — a great time to visit. It ranks #5 of 12 months for Puerto Iguazú on SeasonMap's comfort score (75/100).
- What is the weather like in Puerto Iguazú in September?
- In September, Puerto Iguazú averages a daily high of 28.3°C and a low of 18°C, with about 95 mm of rain over roughly 9.4 rainy days.
- What is the air quality in Puerto Iguazú in September?
- Puerto Iguazú has a mean US Air Quality Index of about 57 in September.