Iguazú Falls in September
In September, Iguazú Falls averages 28°C (82°F) during the day and 17°C (63°F) at night, with frequent rain — about 14 days of the month see precipitation (132 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Iguazú Falls, with some rain to plan around.
How September compares to the rest of the year in Iguazú Falls
September is in the middle of the year for warmth in Iguazú Falls (7th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature matches the city's annual average. September runs 3°C warmer than August (25°C) and warms a further 1°C into October (29°C).
September sunrise & sunset in Iguazú Falls
Times shown for Iguazú Falls local time (America/Argentina/Cordoba), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Iguazú Falls — September
Golden-hour and blue-hour windows for the 15th of September, in Iguazú Falls's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Iguazú Falls in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Iguazú Falls's popularity.
Crowds & pricing — September in Iguazú Falls
Iguazú Falls is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Iguazú Falls
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Iguazú Falls in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 23°C / 73°F | 218 mm | 26 | — |
| February | 31°C / 87°F | 22°C / 71°F | 147 mm | 20 | — |
| March | 29°C / 85°F | 21°C / 69°F | 172 mm | 20 | — |
| April | 27°C / 81°F | 18°C / 65°F | 130 mm | 14 | — |
| May | 23°C / 74°F | 15°C / 59°F | 174 mm | 16 | — |
| June | 22°C / 72°F | 14°C / 57°F | 131 mm | 12 | — |
| July | 23°C / 73°F | 13°C / 56°F | 98 mm | 9 | — |
| August | 25°C / 77°F | 15°C / 59°F | 95 mm | 10 | — |
| September | 28°C / 82°F | 17°C / 63°F | 132 mm | 14 | — |
| October | 29°C / 83°F | 19°C / 66°F | 219 mm | 19 | — |
| November | 30°C / 85°F | 20°C / 67°F | 164 mm | 17 | — |
| December | 31°C / 87°F | 22°C / 71°F | 206 mm | 20 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Iguazú Falls in September →
Frequently asked questions
How hot is Iguazú Falls in September?
In September, Iguazú Falls averages a high of 28°C (82°F) and a low of 17°C (63°F) — generally warm.
Does it rain a lot in Iguazú Falls in September?
September can be fairly wet in Iguazú Falls, with about 14 rainy days on average.
Is September a good time to visit Iguazú Falls?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Iguazú Falls in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Iguazú Falls for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.