The month in detail
What to expect in May
Autumn in Iguazú is often underrated: 77°F, golden light and declining crowds. An interesting window. Expect rain on 26% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if September (8.8/10) remains theoretically better.
May ranks 6 out of 12 months in Iguazú. Compared to April: −5°F daytime, −0.9h of sun per day.
This month's conditions
What it's like in May
UV index
4 · moderate
protect during midday hours
Feels like
muggy at times
16°
Daylight
10.7h of daylight
Air quality
excellent
AQI 15
Compare
Is May the right month?
The best month in Iguazú is September (8.8/10), 0.7 pt higher than May.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Iguazú
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Iguazú
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Argentina
🗣️LanguageSpanish
💶CurrencyArgentine Peso ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 90°F
❄️Coolest monthJune · 73°F
🌧️Rainiest month ⓘJanuary · 36%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in May
If May doesn't convince you for this destination, compare with others.
Location
Where is Iguazú ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
ArgentinaTropical climate with a 8.8 → 5.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
25.69°S · 54.44°W
Questions
Frequently asked questions
What is the best time to visit Iguazú?
September is the best month with 82°F highs, 64°F lows, 7.4h of sunshine and 20.0% rainy days. The months of September & April offer comparable conditions.
How many hours of sunshine does Iguazú get in September?
Iguazú averages 7.4 sunshine hours per day in September. It is the sunniest month with a climate score of 8.2/10.
What is the rainiest month in Iguazú?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Iguazú in September?
In September, overnight lows reach 64°F, while afternoon highs average 82°F.
Is Iguazú good in winter?
In winter (December-February), Iguazú scores 5.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 8.2/10.
When should you avoid Iguazú?
January is the most difficult month to visit Iguazú, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in Iguazú in May?
The average UV index reaches 4 in May in Iguazú (moderate), with about 10.7h of daylight. Protect during midday hours.