Climate averages 1991–2020
Foz do Iguaçu weather
in December.
A hot, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Foz do Iguaçu: daytime highs average 30.5°C and nights cool to about 22.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 184 mm of rain on roughly 15 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 42 min on an average December day.
The nearest other city in this atlas is Ciudad del Este (8 km away). In December its highs average 30.5°C, about as warm as Foz do Iguaçu, with 189 mm of rain.
Among the 448 cities listed in Brazil, Foz do Iguaçu ranks joint 68th of 448 for the warmest December highs and joint 214th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Foz do Iguaçu is 2.0°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 30.8°C, and monthly rainfall falls from 184 mm to 157 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Ciudad del Este in DecemberParaguay · 8 kmHigh 30.5°C · Low 22.4°C · 189 mm rain
- Toledo, Brazil in DecemberBrazil · 126 kmHigh 28.2°C · Low 20.0°C · 186 mm rain
- Cascavel in DecemberBrazil · 132 kmHigh 26.8°C · Low 18.7°C · 179 mm rain
- Francisco Beltrão in DecemberBrazil · 165 kmHigh 27.5°C · Low 18.9°C · 180 mm rain
- Pato Branco in DecemberBrazil · 206 kmHigh 26.0°C · Low 17.4°C · 181 mm rain
- Umuarama in DecemberBrazil · 236 kmHigh 29.3°C · Low 21.2°C · 190 mm rain
- Encarnación in DecemberParaguay · 236 kmHigh 30.4°C · Low 21.4°C · 174 mm rain
- Posadas in DecemberArgentina · 244 kmHigh 30.3°C · Low 21.5°C · 163 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.