Monthly climate guide
Puerto Iguazú weather in September
September in Puerto Iguazú is typically hot, with average daytime highs around 28°C (82°F) and night-time lows near 17°C (62°F). The month usually brings about 110 mm of rain (wet) and is a mix of sun and cloud. Daytime highs are 4°C warmer than August and 2°C cooler than October.
What stands out in September
- Compared with Salta, Puerto Iguazú runs roughly 6°C warmer this month.
- In Puerto Iguazú, September is early spring — the seasons are reversed south of the equator.
- Afternoons and nights feel like different seasons, roughly 11°C apart.
Avg high
28°C
82°F
Avg low
17°C
62°F
Rainfall
110 mm
wet
Humidity
70%
relative
Sky
51%
cloud · a mix of sun and cloud
Puerto Iguazú weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 32°C / 89°F | 23°C / 74°F | 147 mm | 73% | 63% |
| February | 32°C / 89°F | 23°C / 74°F | 139 mm | 73% | 61% |
| March | 31°C / 87°F | 21°C / 70°F | 131 mm | 73% | 51% |
| April | 28°C / 83°F | 19°C / 65°F | 119 mm | 75% | 48% |
| May | 24°C / 76°F | 16°C / 60°F | 148 mm | 80% | 56% |
| June | 22°C / 71°F | 13°C / 56°F | 126 mm | 83% | 57% |
| July | 22°C / 71°F | 13°C / 55°F | 80 mm | 80% | 52% |
| August | 24°C / 76°F | 14°C / 57°F | 77 mm | 74% | 46% |
| September | 28°C / 82°F | 17°C / 62°F | 110 mm | 70% | 51% |
| October | 30°C / 85°F | 20°C / 67°F | 190 mm | 73% | 58% |
| November | 31°C / 87°F | 20°C / 69°F | 149 mm | 71% | 55% |
| December | 32°C / 89°F | 23°C / 73°F | 184 mm | 71% | 64% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Puerto Iguazú?
Compare the months in the chart above to find your ideal window.
Best time to visit Puerto Iguazú →Other Argentina cities in September
Cite or embed this data
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Puerto Iguazú weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/puerto-iguazu/september
<a href="https://weathercompare.eu/weather/argentina/puerto-iguazu/september">Puerto Iguazú weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/puerto-iguazu" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Puerto Iguazú weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/puerto-iguazu/september">Puerto Iguazú weather in September</a> – WeatherCompare</p>
Puerto Iguazú in September: quick answers
Is September a good time to visit Puerto Iguazú?
Yes. September is one of the best months for Puerto Iguazú, with highs around 28°C and about 110 mm of rain.
How warm is Puerto Iguazú in September?
Average highs are about 28°C (82°F) and average lows about 17°C (62°F), based on 10 years of daily data.
Does it rain a lot in Puerto Iguazú in September?
Puerto Iguazú typically gets around 110 mm of rain in September — wet.
Figures are long-term averages for the area around Puerto Iguazú (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.