What to expect in Iguazu Falls in September
September is a strong choice for Iguazu Falls: 26° / 15°, with plenty of space at the main sights and some of the best deals of the year.
Iguazu Falls weather in September
Typical conditions in Iguazu Falls during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 26°C 79°F |
|---|---|
| Average low | 15°C 59°F |
| Rainfall | Wet 130/100 |
| Total rainfall | 160 mm6.3 in |
| Rainy days | 10 |
| Daylight | 11 h 56 min |
| How it feels | Warm and comfortable |
Average highs sit around 26°C with lows near 15°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Low for Iguazu Falls — plenty of space at the main sights.
Prices & value
This month counts as low season: some of the best deals of the year.
What to pack
Light layers for 26°C days and something with sleeves for evenings, which cool to around 15°C. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
This is one of the cheaper months to visit Iguazu Falls. Flights and accommodation sit near their yearly floor, and you can usually book late without being punished for it. Compared with the most expensive month of the year, you are looking at roughly 45% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
Events & what’s on
No major festivals fall in September, so the destination feels like its everyday self.
Iguazu Falls in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 23° / 12° | Moderate | $$ | 52 |
| August | 25° / 13° | Moderate | $ | 64 |
| September · This month | 26° / 15° | Low | $ | 60 |
| October | 28° / 17° | Low | $ | 51 |
| November | 30° / 19° | Moderate | $$ | 46 |
These months score higher for Iguazu Falls on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
