Iguazu in Spring
In spring (September, October and November), Iguazu sees average daytime highs around 28°C and overnight lows near 18°C, with 510 mm of rain over about 35 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs climb from about 26°C in early September to 30°C by late November. The sky is clear or mostly clear about 40% of the time across spring, and the air most often feels muggy.
Spring is Iguazu's 3rd-best season to visit on our travel score. For the whole year in context, see Iguazu's year-round climate.
- Avg daytime high
- 28°C
- 2nd-warmest season
- Avg overnight low
- 18°C
- Rainfall
- 510 mm
- 35 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.7
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Iguazu in Spring
Over the season highs climb from about 26°C in early September to 30°C by late November.
A typical spring day in Iguazu reaches about 28°C and drops to 18°C overnight. The warmest of the three months is November, the coolest September.
How spring really feels in Iguazu
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
spring sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Iguazu weather by month
How the three spring months (September, October and November) 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 | 15.3 | 13.4 | 3.9 |
| Feb | 31° / 22° | 151 | 14 | 12.9 | 4.1 |
| Mar | 30° / 21° | 141 | 12.5 | 12.2 | 4.8 |
| Apr | 28° / 18° | 138 | 9.4 | 11.4 | 6.3 |
| May | 24° / 15° | 162 | 9.1 | 10.8 | 7.1 |
| Jun | 22° / 14° | 137 | 9.2 | 10.4 | 6.9 |
| Jul | 22° / 13° | 118 | 8.5 | 10.6 | 7.2 |
| Aug | 25° / 14° | 94 | 7 | 11.1 | 7.7 |
| Sep | 27° / 16° | 155 | 9.9 | 11.8 | 6.7 |
| Oct | 28° / 19° | 197 | 13.2 | 12.6 | 5.5 |
| Nov | 30° / 20° | 158 | 11.7 | 13.3 | 5.0 |
| Dec | 31° / 21° | 184 | 14.8 | 13.6 | 4.2 |
Cloud cover in Spring
The sky is clear or mostly clear about 40% of the time across spring.
Chance of precipitation in Spring
Iguazu gets around 510 mm of rain over 35 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 10 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 30 min in early September to 13 h 30 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.5 kWh/m².
Is spring a good time to visit Iguazu?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Iguazu for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Iguazu in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Iguazu sees daytime highs around 28°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 35 days see rain.
UV index in Iguazu in Spring
Clear-sky midday UV across spring 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 Iguazu 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 Iguazu in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Iguazu 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 Iguazu?
Iguazu sits at 25.6°S, 54.6°W, 177 m above sea level, in Argentina. The nearest listed city is Presidente Franco, 5.0 km away.
Topography around Iguazu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Iguazu.
Within 3 km, the terrain around Iguazu has only modest variations in elevation — a maximum elevation change of 139 m around an average of 175 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 198 m; within 80 km, significant variations in elevation — a maximum elevation change of 568 m.
The land around Iguazu is covered by trees (50%) and artificial surfaces (30%) within 3 km, trees (52%) and cropland (22%) within 16 km, and trees (46%) and cropland (38%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- 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 Iguazu (-25.5991°, -54.5735°, elevation 177 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.