Foz do Iguaçu weather in September
September in Foz do Iguaçu: hot, rainy — a great time to visit.
#5 of 12 months in Foz do Iguaçu · #373 of 604 destinations to visit in September · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Foz do Iguaçu climate normals — September
| Daytime high | 28°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 18°C / 65°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.
Where is Foz do Iguaçu?
Loading map…
Foz do Iguaçu in September — FAQ
- Is September a good time to visit Foz do Iguaçu?
- September in Foz do Iguaçu: hot, rainy — a great time to visit. It ranks #5 of 12 months for Foz do Iguaçu on SeasonMap's comfort score (75/100).
- What is the weather like in Foz do Iguaçu in September?
- In September, Foz do Iguaçu averages a daily high of 28.3°C and a low of 18.2°C, with about 95 mm of rain over roughly 9.4 rainy days.
- What is the air quality in Foz do Iguaçu in September?
- Foz do Iguaçu has a mean US Air Quality Index of about 57 in September.