In Puerto Iguazú, December brings very high daytime temperatures around 32°C (90°F), with nights cooling to 21°C (70°F). This month falls within the rainy season, so expect frequent rainfall.
December in Puerto Iguazú can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Min Temperature
Max Temperature
Chance of Rain
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Percentage Sunshine
Pick a month to see the average temperature, rainfall and sunshine in Puerto Iguazú - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Puerto Iguazú typically stay consistent throughout December, with daily highs averaging around 32°C (90°F). Nights are warm, with lows typically ranging from 19°C (66°F) to 21°C (70°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Puerto Iguazú spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Puerto Iguazú between 1976 and 2025, these are the recorded extremes during December.
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Puerto Iguazú climate overview or explore weather in Argentina.
Where to go in December - average daytime high across popular destinations.
Córdoba
30°C (86°F) Mendoza
30°C (86°F) Buenos Aires29°C (84°F) Villa Carlos Paz
27°C (81°F) Salta25°C (77°F) Mar del Plata24°C (75°F) San Martín de los Andes
18°C (64°F) San Carlos de Bariloche18°C (64°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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