Weather in Iguazu in September 2025
- September is usually the driest month of the year in Iguazu
Average weather
Average temperature in Iguazu in September
Going from a maximum of +38°C during the day to a minimum of +9°C during the night, the temperature in September averages around +29°C.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +24°C to +27°C.
Is Iguazu warm or cold in September?
Iguazu is typically warm in September.
Maximum temperatures go up compared to the previous month from +25°C to +26°C. The minimum temperature also goes up from +14°C to +15°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Iguazu:
Climate in Iguazu in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +26°C | +28°C | ||||
| Min. temperature | ||||||
| 0°C | +2°C | +6°C | ||||
| Max. temperature | ||||||
| +35°C | +39°C | +40°C | ||||
| Rainfall | ||||||
| 103 mm | 152 mm | 208 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 76% | 75% | 78% | ||||
| Air pressure | ||||||
| 1016 HPa | 1014 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 15 | 11 | 9 | ||||
| Cloudy days | ||||||
| 6 | 5 | 4 | ||||
| Rainy days | ||||||
| 9 | 12 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting warmer as September arrives. The average maximum temperature goes up from +25°C to +26°C during the day. Prepare for more rain. Average rainfall goes from 103 mm to 152 mm. It feels drier, as humidity decreases from 76% to 75%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 15 sunny days in August to 11 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Iguazu is gradually decreasing during September, going from 3 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Iguazu?
Climate Change over Years
The climate in Iguazu in September has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+26°C) and the highest in 2020 (+28°C). The driest year was 2020 with only 1219 mm of rainfall, and the wettest year was 1983 with 3257 mm.
FAQ
Is September a good time to visit Iguazu?
Can you sunbathe in Iguazu in September?
Is Iguazu rainy in September?
Is it sunny in Iguazu in September?
Other cities in Argentina
Monthly weather in Iguazu
Source of the data
For this page, we’ve looked at the typical weather in Iguazu, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.