Climate averages 1991–2020
Foz do Iguaçu weather
in September.
A warm, wet month: the 8th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Foz do Iguaçu: daytime highs average 26.4°C and nights cool to about 16.7°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 155 mm of rain on roughly 10 days, which makes September a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average September day.
The nearest other city in this atlas is Ciudad del Este (8 km away). In September its highs average 26.3°C, about as warm as Foz do Iguaçu, with 157 mm of rain.
Among the 448 cities listed in Brazil, Foz do Iguaçu ranks joint 268th of 448 for the warmest September highs and joint 423rd of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Foz do Iguaçu is 1.1°C cooler than that mean.
From September to October, average highs rise by 1.9°C to 28.3°C, and monthly rainfall rises from 155 mm to 197 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Foz do Iguaçu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.8°C23.3°C | 23.3°C | 157 | 15.3 | 13.514 h |
| February | 30.3°C22.9°C | 22.9°C | 153 | 14.1 | 13.013 h |
| March | 29.5°C21.8°C | 21.8°C | 141 | 12.5 | 12.312 h |
| April | 27.2°C19.2°C | 19.2°C | 138 | 9.4 | 11.512 h |
| May | 23.2°C15.8°C | 15.8°C | 162 | 9.1 | 10.911 h |
| June | 21.8°C14.5°C | 14.5°C | 137 | 9.2 | 10.611 h |
| July | 21.7°C13.4°C | 13.4°C | 118 | 8.5 | 10.711 h |
| August | 24.3°C14.8°C | 14.8°C | 94 | 7.0 | 11.211 h |
| September, selected | 26.4°C16.7°C | 16.7°C | 155 | 9.9 | 11.912 h |
| October | 28.3°C19.6°C | 19.6°C | 197 | 13.2 | 12.713 h |
| November | 29.2°C20.4°C | 20.4°C | 158 | 11.7 | 13.313 h |
| December | 30.5°C22.4°C | 22.4°C | 184 | 14.8 | 13.714 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Ciudad del Este in SeptemberParaguay · 8 kmHigh 26.3°C · Low 16.7°C · 157 mm rain
- Toledo, Brazil in SeptemberBrazil · 126 kmHigh 25.6°C · Low 15.7°C · 148 mm rain
- Cascavel in SeptemberBrazil · 132 kmHigh 24.1°C · Low 14.2°C · 150 mm rain
- Francisco Beltrão in SeptemberBrazil · 165 kmHigh 23.8°C · Low 13.7°C · 174 mm rain
- Pato Branco in SeptemberBrazil · 206 kmHigh 22.5°C · Low 12.5°C · 177 mm rain
- Umuarama in SeptemberBrazil · 236 kmHigh 26.9°C · Low 16.9°C · 134 mm rain
- Encarnación in SeptemberParaguay · 236 kmHigh 24.5°C · Low 15.0°C · 151 mm rain
- Posadas in SeptemberArgentina · 244 kmHigh 24.3°C · Low 15.0°C · 147 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Foz do Iguaçu) is explained once on the Foz do Iguaçu year overview and on the Sources, method and limits page.