Weather in Foz Do Iguacu in September 2025
- September is usually the driest month of the year in Foz Do Iguacu
Average weather
Average temperature in Foz Do Iguacu in September
Going from a maximum of +38°C during the day to a minimum of +7°C during the night, the temperature in September averages around +30°C.
The average maximum temperature goes up 19% by the end of the month, compared with the beginning of the month, from +24°C to +30°C.
Is Foz Do Iguacu warm or cold in September?
Foz Do Iguacu is typically warm in September.
Maximum temperatures go up compared to the previous month from +25°C to +27°C. The minimum temperature also goes up from +14°C to +16°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 Foz Do Iguacu:
Climate in Foz Do Iguacu in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +27°C | +29°C | ||||
| Min. temperature | ||||||
| -1°C | +1°C | +5°C | ||||
| Max. temperature | ||||||
| +37°C | +40°C | +40°C | ||||
| Rainfall | ||||||
| 99 mm | 146 mm | 194 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 75% | 74% | 76% | ||||
| Air pressure | ||||||
| 1016 HPa | 1014 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 15 | 12 | 9 | ||||
| Cloudy days | ||||||
| 6 | 5 | 4 | ||||
| Rainy days | ||||||
| 9 | 11 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +25°C to +27°C during the day. Prepare for more rain. Average rainfall goes from 99 mm to 146 mm. It feels drier, as humidity decreases from 75% to 74%. 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 12 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Foz Do Iguacu is gradually decreasing during September, going from 5 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Foz Do Iguacu?
Climate Change over Years
The climate in Foz Do Iguacu 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 (+29°C). The driest year was 2021 with only 1098 mm of rainfall, and the wettest year was 1983 with 2760 mm.
FAQ
Is September a good time to visit Foz Do Iguacu?
Can you sunbathe in Foz Do Iguacu in September?
Is Foz Do Iguacu rainy in September?
Is it sunny in Foz Do Iguacu in September?
Other cities in Brazil
Monthly weather in Foz Do Iguacu
Source of the data
For this page, we’ve looked at the typical weather in Foz Do Iguacu, 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.