Late autumn · Weather & things to do
Iguazú in May
Iguazú cools off: highs slip to 75°F (24°C), from 84°F in April, with lows of 59°F (15°C) and about 6.4 in (163 mm) of rain.
It scores 70/100 for comfort, 6th of 12, which makes it a solid shoulder-season month.
- Avg high
- 75°F (24°C)
- Avg low
- 59°F (15°C)
- Rain
- 6.4 in (163 mm)
- Humidity
- 80%
- Cloud cover
- 55%
- Daylight
- ~10 h 45 min
- Comfort score
- 70/100 · Good
What May feels like
Days are warm, averaging 75°F (24°C).
Nights cool to an average low of 59°F (15°C).
Expect regular rain: about 6.4 in (163 mm) falls in the month.
Plan around May
May is shoulder season: good weather, a step below the best months (June – September).
- The year's biggest cool-down: highs drop 5°C (9°F) from April.
- Comfort holds steady from April (72 → 70/100).
- May sits inside the Mar – May, Sep – Nov window our Buenos Aires, Mendoza & Iguazú route recommends.
What to pack for May
- Light, breathable clothes75°F afternoons
- Rain jacket and waterproof shoes6.4 in of rain on average
- Comfortable walking shoesmost picks involve some walking
What to do in Iguazú in May
May is good outdoor weather here, so these picks lean toward the open air.
Garganta del Diablo
U-shaped chasm where half the river plunges 80 m, reached by train and a long catwalk.
Why now May scores 70/100 for comfort, good conditions for being outside.
Parque Nacional do Iguaçu
Brazilian side with a panoramic trail facing the main falls and a walkway into the spray.
Why now Highs near 75°F and 6.4 in of monthly rain make this an easy outdoor pick.
Itaipu Dam
Huge hydroelectric dam on the Brazil–Paraguay border with panoramic and technical tours.
Parque das Aves
Bird park beside the Brazilian park entrance with walk-in aviaries of toucans and macaws.
Why now One to do outside while the weather is on your side.
Gran Meliá Iguazú
Hotel inside the Argentine park whose bar and terrace look straight at the falls.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Iguazú in May: quick answers
Is May a good time to visit Iguazú?
It's a good shoulder-season choice, scoring 70/100 against a best of 87 in June – September. Expect highs of 75°F (24°C) and 6.4 in (163 mm) of rain. May is inside the Mar – May, Sep – Nov window our Buenos Aires, Mendoza & Iguazú route recommends.
How hot is Iguazú in May?
Average highs are 75°F (24°C) and average lows 59°F (15°C), making it the 3rd-coldest month by daytime highs.
Does it rain a lot in Iguazú in May?
Yes: about 6.4 in (163 mm) of rain falls across May on average, the 3rd-wettest month of the year. The annual total is about 63.5 in (1613 mm).
What should I pack for Iguazú in May?
Bring light, breathable clothes (75°F afternoons), rain jacket and waterproof shoes (6.4 in of rain on average) and comfortable walking shoes (most picks involve some walking).
Routes in season in May
- Buenos Aires, Mendoza & Iguazú Mar – May, Sep – Nov
Planning Iguazú in May?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.