Iguazú · AutumnMonth summary
Iguazú weather in September
✅ Good
🌡️ Temperature min / max
18°C – 28°C
🌧 Rainy days
28% of days
☀️ Sunshine
11.0h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
8.4/10
📅 📅 Best month
September (8.4/10)
Quick decision
Should you visit Iguazú in September?
✅ Good
✅ Yes if: you want good weather with lower prices than peak season.
❌ No if: you need guaranteed perfect weather — some mixed days are possible.
Our take: Iguazú in September: 28°C and 11.0h of sunshine. Decent, but not the peak.
By trip type
Iguazú in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
🎯 Peak season — book ahead for best rates. Accommodation prices at their highest Autumn in Iguazú is often underrated: 28°C, golden light and declining crowds. An interesting window. Expect rain on 28% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if September (8.4/10) remains theoretically better.
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Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 23°C | 32°C | 54% | 6.7 | 12.3h | 7.2/10 |
| 🌤️ February | 23°C | 32°C | 47% | 5.1 | 12.1h | 7.3/10 |
| 🌤️ March | 22°C | 31°C | 42% | 5.1 | 11.5h | 7.5/10 |
| 🌤️ April | 20°C | 28°C | 30% | 4.4 | 10.9h | 8.3/10 |
| 🌤️ May | 17°C | 25°C | 35% | 5.7 | 9.7h | 7.7/10 |
| 🌤️ June | 15°C | 23°C | 31% | 4.3 | 9.9h | 7.6/10 |
| 🌤️ July | 15°C | 24°C | 19% | 2.1 | 10.2h | 8.1/10 |
| ☀️ August | 15°C | 26°C | 23% | 3.0 | 10.7h | 8.3/10 |
| 🌤️ September | 18°C | 28°C | 28% | 3.4 | 11.0h | 8.4/10 |
| 🌤️ October | 19°C | 28°C | 46% | 7.7 | 11.2h | 7.8/10 |
| 🌤️ November | 21°C | 31°C | 36% | 5.1 | 12.8h | 7.7/10 |
| 🌤️ December | 22°C | 32°C | 48% | 6.0 | 13.0h | 7.4/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Iguazú averages 28°C, 28% rainy days and 11.0h of sunshine per day. Overall weather score: 8.4/10.
See methodology →
Comparison
September vs September (best month)
The best month is September (score 8.4/10). Difference:
- 🌡️ Max temperature : +0°C
- 🌧 Rainy days : +0%
- ☀️ Sunshine : +0.0h/day
FAQ
FAQ — Iguazú in September
Is September a good time to visit Iguazú?
September is an excellent time to visit Iguazú (score 8.4/10). With 28°C, 11.0h of sunshine and 28% rain, conditions are very favourable.
What to do in Iguazú in September?
With 28°C and 11.0h of sunshine, all outdoor activities are possible: hiking, sightseeing and terraces.
Accommodation
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Activities & tours
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