Foz do Iguaçu in September
In September, Foz do Iguaçu averages 27°C (81°F) during the day and 18°C (64°F) at night, with around 9 days of rain (129 mm total).
ShoulderConditions are warm and beach-friendly. Occasional showers are likely but won't dominate.
September is a great month to visit Foz do Iguaçu: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Foz do Iguaçu
September is in the middle of the year for warmth in Foz do Iguaçu (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 Foz do Iguaçu
Times shown for Foz do Iguaçu local time (America/Sao_Paulo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Foz do Iguaçu — September
Golden-hour and blue-hour windows for the 15th of September, in Foz do Iguaçu's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Foz do Iguaçu 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 Foz do Iguaçu's popularity.
Crowds & pricing — September in Foz do Iguaçu
Foz do Iguaçu 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 Foz do Iguaçu
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.
Foz do Iguaçu in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 24°C / 75°F | 192 mm | 17 | — |
| February | 30°C / 87°F | 23°C / 73°F | 127 mm | 13 | — |
| March | 29°C / 85°F | 21°C / 70°F | 162 mm | 12 | — |
| April | 27°C / 81°F | 19°C / 66°F | 104 mm | 7 | — |
| May | 23°C / 74°F | 16°C / 61°F | 152 mm | 11 | — |
| June | 22°C / 71°F | 14°C / 58°F | 127 mm | 10 | — |
| July | 23°C / 73°F | 14°C / 57°F | 106 mm | 7 | — |
| August | 25°C / 76°F | 15°C / 59°F | 100 mm | 7 | — |
| September | 27°C / 81°F | 18°C / 64°F | 129 mm | 9 | — |
| October | 29°C / 84°F | 20°C / 68°F | 213 mm | 13 | — |
| November | 30°C / 85°F | 20°C / 69°F | 159 mm | 12 | — |
| December | 31°C / 87°F | 22°C / 72°F | 182 mm | 15 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Foz do Iguaçu in September →
Frequently asked questions
How hot is Foz do Iguaçu in September?
In September, Foz do Iguaçu averages a high of 27°C (81°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Foz do Iguaçu in September?
September sees occasional rain in Foz do Iguaçu, with about 9 rainy days on average.
Is September a good time to visit Foz do Iguaçu?
September is warm. 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 Foz do Iguaçu in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen. See the full September packing list for Foz do Iguaçu for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.