Quedas do Iguaçu in Summer
In summer (December, January and February), Quedas do Iguaçu sees average daytime highs around 29°C and overnight lows near 20°C, with 556 mm of rain over about 52 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 28% of the time across summer, and the air most often feels muggy.
Summer is Quedas do Iguaçu's weakest season of the year to visit on our travel score. For the whole year in context, see Quedas do Iguaçu's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 556 mm
- 52 wet days
- Avg wind
- 8 km/h
- Travel score
- 4.4
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Quedas do Iguaçu in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in Quedas do Iguaçu reaches about 29°C and drops to 20°C overnight. The warmest of the three months is January, the coolest December.
Quedas do Iguaçu weather by month
How the three summer months (December, January and February) 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 | 30° / 20° | 181 | 18.3 | 13.4 | 4.2 |
| Feb | 29° / 20° | 182 | 16.9 | 12.9 | 4.4 |
| Mar | 29° / 19° | 141 | 14.3 | 12.2 | 5.3 |
| Apr | 26° / 16° | 124 | 10.2 | 11.4 | 6.6 |
| May | 23° / 13° | 149 | 10.1 | 10.8 | 6.9 |
| Jun | 22° / 12° | 142 | 9.5 | 10.4 | 6.8 |
| Jul | 22° / 12° | 114 | 8.4 | 10.6 | 7.1 |
| Aug | 24° / 13° | 96 | 7.5 | 11.1 | 7.6 |
| Sep | 26° / 15° | 162 | 10.4 | 11.8 | 6.8 |
| Oct | 27° / 17° | 212 | 15.3 | 12.6 | 5.7 |
| Nov | 28° / 18° | 166 | 13.3 | 13.2 | 5.6 |
| Dec | 29° / 19° | 193 | 17 | 13.6 | 4.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 28% of the time across summer.
Chance of precipitation in Summer
Quedas do Iguaçu gets around 556 mm of rain over 52 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 30 min in early December to 12 h 36 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.1 kWh/m².
Is summer a good time to visit Quedas do Iguaçu?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Quedas do Iguaçu for sightseeing.
What to pack for Quedas do Iguaçu in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Quedas do Iguaçu sees daytime highs around 29°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 52 days see rain.
UV index in Quedas do Iguaçu in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Quedas do Iguaçu peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).
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 | 15 | 12 | 9 | 6 | 5 | 5 | 6 | 8 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | Moderate | High | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 5 | Moderate |
| Aug | 6 | High |
| Sep | 8 | Very high |
| Oct | 10 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Quedas do Iguaçu in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Quedas do Iguaçu is worst in September — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (March, 6 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 | 7 | 6 | 8 | 7 | 7 | 9 | 12 | 20 | 13 | 9 | 7 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 7 | Good |
| Mar | 6 | Good |
| Apr | 8 | Good |
| May | 7 | Good |
| Jun | 7 | Good |
| Jul | 9 | Good |
| Aug | 12 | Moderate |
| Sep | 20 | Moderate |
| Oct | 13 | Moderate |
| Nov | 9 | Good |
| Dec | 7 | Good |
Where is Quedas do Iguaçu?
Quedas do Iguaçu sits at 25.5°S, 52.9°W, 564 m above sea level, in Brazil. The nearest listed city is Dois Vizinhos, 35 km away.
Topography around Quedas do Iguaçu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Quedas do Iguaçu.
Within 3 km, the terrain around Quedas do Iguaçu has only modest variations in elevation — a maximum elevation change of 180 m around an average of 546 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 486 m; within 80 km, large variations in elevation — a maximum elevation change of 920 m.
The land around Quedas do Iguaçu is covered by trees (46%) and cropland (27%) within 3 km, trees (44%) and cropland (35%) within 16 km, and trees (38%), cropland (35%) and grassland (23%) 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 Quedas do Iguaçu (-25.453°, -52.9046°, elevation 564 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.