Climate averages 1991–2020
Foz do Iguaçu weather
in May.
A warm, wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Foz do Iguaçu: daytime highs average 23.2°C and nights cool to about 15.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 162 mm of rain on roughly 9 days, which makes May a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 53 min on an average May day.
The nearest other city in this atlas is Ciudad del Este (8 km away). In May its highs average 23.1°C, about as warm as Foz do Iguaçu, with 161 mm of rain.
Among the 448 cities listed in Brazil, Foz do Iguaçu ranks joint 321st of 448 for the warmest May highs and 406th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Foz do Iguaçu is 2.1°C cooler than that mean.
From May to June, average highs fall by 1.4°C to 21.8°C, and monthly rainfall falls from 162 mm to 137 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Ciudad del Este in MayParaguay · 8 kmHigh 23.1°C · Low 15.8°C · 161 mm rain
- Toledo, Brazil in MayBrazil · 126 kmHigh 22.1°C · Low 14.3°C · 157 mm rain
- Cascavel in MayBrazil · 132 kmHigh 20.7°C · Low 12.8°C · 151 mm rain
- Francisco Beltrão in MayBrazil · 165 kmHigh 21.0°C · Low 12.6°C · 147 mm rain
- Pato Branco in MayBrazil · 206 kmHigh 19.8°C · Low 11.3°C · 142 mm rain
- Umuarama in MayBrazil · 236 kmHigh 23.4°C · Low 15.3°C · 140 mm rain
- Encarnación in MayParaguay · 236 kmHigh 22.2°C · Low 14.7°C · 154 mm rain
- Posadas in MayArgentina · 244 kmHigh 22.1°C · Low 14.8°C · 143 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.