SeasonScore
Iguazu Falls, Brazil
Photo: SF Brit · CC BY 2.0

Brazil

Iguazu Falls in January

🥵 Hot summer

Hot, humid and often rainy.

🎒 Pack: light, breathable clothes & sunscreen · compact umbrella or rain jacket · quick-dry fabrics

Best months: May (9.1), Jul (9.1), Aug (9.1)

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Why January scores 7.7What goes into the score

How it works
🌡️ 33° / 20°C🌧️ 196 mm💧 dew pt 21°🍃 PM2.5 9
  • Weather comfort6.6
    • ✓Hot (33°C highs / 20°C lows)
    • !Humid (dew point 21°C)
    • !Wet: ~196 mm rain, ~6 heavy-rain days
  • Air quality9.4
    • ✓Good (within WHO guideline) (PM2.5 ~9 µg/m³)
  • Seasonal hazards9.5
    • !Flood: ~6 heavy-rain days in an average January
  • Safety baseline6.5
    • ·Increased caution
Compare monthsPut January side by side with another month
JanMay
Score7.7 Very good9.1 Excellent
Season🥵 Hot summer🍂 Autumn
High / low33° / 20°25° / 12°
Rain196 mm128 mm
Humiditydew pt 21°dew pt 13°
PM2.59 µg/m³7 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Foz do Iguaçu weather-station normals. Rainfall: Foz do Iguaçu weather-station normals (national met service).

Holidays & crowdsJanuary 2027

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Universal Fraternization Day 1–3 Jan · 3 days off in a row

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore Iguazu FallsEvents, sights, food & souvenirs

Check event dates locally

A vast system of waterfalls on the border of Brazil and Argentina, reached from Foz do Iguaçu and Puerto Iguazú, surrounded by subtropical rainforest.

Events in January
High water seasonDate variesUsually December to March, but varies with rainfall

Summer rains often bring the highest flow and most dramatic falls.

Why go: Water levels depend on upstream rain and can change sharply; heavy flow can close some walkways.

Where: Both sides of the falls

Full moon walksDate variesA few nights around each full moon, weather permitting

Guided night visits to the Devil's Throat by moonlight.

Why go: Places are limited and walks are cancelled in cloudy or rainy weather.

Where: Garganta del Diablo, Argentine side

Plan this tripTickets, data and transfers for Iguazu Falls

Airport transfer Kiwitaxi

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