Early summer · Weather & things to do
Iguazú in December
Iguazú edges warmer than November, with highs of 89°F (32°C), lows of 73°F (23°C) and about 7.0 in (179 mm) of rain.
With a comfort score of 51/100 (12th of 12), it's one of the toughest months, held back mainly by rain.
- Avg high
- 89°F (32°C)
- Avg low
- 73°F (23°C)
- Rain
- 7.0 in (179 mm)
- Humidity
- 71%
- Cloud cover
- 67%
- Daylight
- ~13 h 35 min
- Comfort score
- 51/100 · Fair
What December feels like
Afternoons run hot at about 89°F (32°C), which leaves mornings and evenings as the time for walking.
Nights stay warm too, with lows averaging 73°F (23°C).
Rain is a real factor, with about 7.0 in (179 mm) across the month.
Plan around December
December is one of the lower-scoring months here; the best are June – September.
- Inside the wettest three-month stretch, October – December.
- Longest days of the year, about 13 h 35 min of daylight.
- Comfort slips from 61/100 in November to 51/100.
- Our Buenos Aires, Mendoza & Iguazú route recommends Mar – May, Sep – Nov, so December falls outside its suggested window.
What to pack for December
- Light, breathable clotheshighs average 89°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Refillable water bottleeasy to dehydrate in the heat
- Rain jacket and waterproof shoesfrequent rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Iguazú in December
With 7.0 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
El Quincho del Tío Querido
Busy parrilla in Puerto Iguazú with grilled meats and live music most nights.
Why now A sit-down stop to wait out showers in a month with 7.0 in of rain.
Hito Tres Fronteras
Lookout where Argentina, Brazil and Paraguay meet at the river junction.
Why now Go early — afternoons average 89°F.
Itaipu Dam
Huge hydroelectric dam on the Brazil–Paraguay border with panoramic and technical tours.
Parque Nacional do Iguaçu
Brazilian side with a panoramic trail facing the main falls and a walkway into the spray.
Why now Best first thing, before the 89°F afternoon heat.
Aqva Restaurant
Puerto Iguazú restaurant serving river fish like surubí and regional dishes.
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 December: quick answers
Is December a good time to visit Iguazú?
It's one of the tougher months here, scoring 51/100, held back mainly by rain. The best months are June – September. Expect highs of 89°F (32°C) and 7.0 in (179 mm) of rain. Our Buenos Aires, Mendoza & Iguazú route recommends Mar – May, Sep – Nov, so December is outside its suggested window.
How hot is Iguazú in December?
Average highs are 89°F (32°C) and average lows 73°F (23°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Iguazú in December?
Yes: about 7.0 in (179 mm) of rain falls across December on average, the 2nd-wettest month of the year. The annual total is about 63.5 in (1613 mm).
What should I pack for Iguazú in December?
Bring light, breathable clothes (highs average 89°F), sunscreen, sunglasses and a hat (high UV on clear days), refillable water bottle (easy to dehydrate in the heat), rain jacket and waterproof shoes (frequent rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
Planning Iguazú in December?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.