Foz do Iguacu in Fall
In fall (March, April and May), Foz do Iguacu sees average daytime highs around 27°C and overnight lows near 18°C, with 441 mm of rain over about 31 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 31°C in early March to 22°C by late May. The sky is clear or mostly clear about 42% of the time across fall, and the air most often feels muggy.
Fall is Foz do Iguacu's 2nd-best season to visit on our travel score. For the whole year in context, see Foz do Iguacu's year-round climate.
- Avg daytime high
- 27°C
- 3rd-warmest season
- Avg overnight low
- 18°C
- Rainfall
- 441 mm
- 31 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.1
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Foz do Iguacu in Fall
Over the season highs ease from about 31°C in early March to 22°C by late May.
A typical fall day in Foz do Iguacu reaches about 27°C and drops to 18°C overnight. The warmest of the three months is March, the coolest May.
How fall really feels in Foz do Iguacu
Once humidity and wind are folded in, fall brings about 19 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Foz do Iguacu weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 22° | 157 | 15.4 | 13.4 | 3.9 |
| Feb | 31° / 22° | 152 | 13.9 | 12.9 | 4.1 |
| Mar | 30° / 21° | 141 | 12.5 | 12.2 | 4.8 |
| Apr | 28° / 18° | 138 | 9.2 | 11.4 | 6.3 |
| May | 24° / 15° | 162 | 9.2 | 10.8 | 7.1 |
| Jun | 22° / 14° | 137 | 9.2 | 10.4 | 6.9 |
| Jul | 22° / 13° | 117 | 8.5 | 10.6 | 7.2 |
| Aug | 25° / 14° | 94 | 6.9 | 11.1 | 7.6 |
| Sep | 27° / 16° | 154 | 9.9 | 11.8 | 6.7 |
| Oct | 28° / 19° | 198 | 13.2 | 12.6 | 5.4 |
| Nov | 30° / 20° | 158 | 11.5 | 13.2 | 5.0 |
| Dec | 31° / 21° | 184 | 14.9 | 13.6 | 4.1 |
Cloud cover in Fall
The sky is clear or mostly clear about 42% of the time across fall.
Chance of precipitation in Fall
Foz do Iguacu gets around 441 mm of rain over 31 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 36 min in early March to 10 h 30 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.3 kWh/m².
Is fall a good time to visit Foz do Iguacu?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Foz do Iguacu for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Foz do Iguacu in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Foz do Iguacu sees daytime highs around 27°C and nights near 18°C. Pack light clothes. Worth having: rain gear and sun protection. About 31 days see rain.
UV index in Foz do Iguacu in Fall
Clear-sky midday UV across fall averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Foz do Iguacu peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 14 | 11 | 9 | 6 | 5 | 5 | 6 | 6 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | Moderate | High | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 11 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 5 | Moderate |
| Aug | 6 | High |
| Sep | 6 | High |
| Oct | 10 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Foz do Iguacu in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Foz do Iguacu is worst in September — around 23 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (March, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 8 | 8 | 9 | 10 | 10 | 11 | 14 | 23 | 14 | 10 | 8 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 8 | Good |
| Apr | 9 | Good |
| May | 10 | Good |
| Jun | 10 | Good |
| Jul | 11 | Good |
| Aug | 14 | Moderate |
| Sep | 23 | Moderate |
| Oct | 14 | Moderate |
| Nov | 10 | Good |
| Dec | 8 | Good |
Where is Foz do Iguacu?
Foz do Iguacu sits at 25.5°S, 54.6°W, 179 m above sea level, in Brazil. The nearest listed city is Presidente Franco, 3.0 km away.
Topography around Foz do Iguacu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Foz do Iguacu.
Within 3 km, the terrain around Foz do Iguacu has only modest variations in elevation — a maximum elevation change of 128 m around an average of 176 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 200 m; within 80 km, significant variations in elevation — a maximum elevation change of 568 m.
The land around Foz do Iguacu is covered by artificial surfaces (48%) and trees (37%) within 3 km, trees (40%) and cropland (24%) within 16 km, and trees (44%) and cropland (39%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Foz do Iguacu (-25.5478°, -54.5881°, elevation 179 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.