Puerto Iguazú, in Argentina’s subtropical northeast, features a humid subtropical climate with hot, rainy summers and mild, wet winters. The city experiences abundant rainfall year-round, high humidity, and moderate seasonal temperature swings. With lush rainforests, dramatic waterfalls, and a vibrant outdoor atmosphere, Puerto Iguazú is a captivating destination for nature and adventure lovers.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Puerto Iguazú’s climate is defined by its humid subtropical setting and proximity to the Atlantic rainforest. Summers (October–March) are long, hot, and muggy, with average highs of 30–32°C and lows of 19–21°C. January is the hottest month, with daytime highs often reaching 32°C and occasional peaks above 36°C. Rainfall is abundant, with summer months receiving 150–220 mm per month and frequent thunderstorms that bring relief from the heat. Humidity is high, averaging 75–80%, and sunshine is moderate, with 6–7 hours per day. Days are long, with up to 13.5 hours of daylight in December and January.
Winters (June–August) are short, mild, and still quite wet, with highs of 22–25°C and lows of 11–13°C. July is the coolest month, but frost is rare and snow does not occur. Rainfall remains significant, with 80–110 mm per month, and humidity stays elevated. Spring (September–November) and autumn (April–May) are transitional, with mild to warm temperatures (22–28°C), frequent showers, and lush, vibrant landscapes. Winds are generally light to moderate, averaging 10–15 km/h, and the city receives around 1,950–2,000 mm of precipitation annually. Sunshine is highest in December and January, with up to 7 hours per day, and lowest in winter and spring, with about 3.5–5.5 hours daily. The climate supports dense rainforests, diverse wildlife, and the spectacular Iguazú Falls.
| Average climate data for Puerto Iguazú, Argentina | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 31 | 31 | 31 | 26 | 24 | 22 | 22 | 25 | 26 | 28 | 30 | 31 | 31 |
| Average minimum temperature (°C) | 21 | 20 | 19 | 17 | 12 | 11 | 11 | 12 | 14 | 17 | 18 | 20 | 11 |
| Average precipitation (mm) | 170 | 141 | 125 | 166 | 173 | 126 | 108 | 82 | 163 | 264 | 169 | 214 | 1,902 |
| Average rainfall days (days) | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 6 | 9 | 11 | 8 | 9 | 98 |
| Average relative humidity (%) | 76 | 77 | 79 | 81 | 84 | 84 | 81 | 80 | 74 | 74 | 75 | 72 | 78 |
| Average daily daylight hours (h) | 13 | 13 | 12 | 11 | 10 | 10 | 10 | 11 | 12 | 12 | 13 | 13 | 12 |
| Average daily sunshine hours (h) | 6 | 5 | 5 | 5 | 4 | 3 | 4 | 4 | 3 | 5 | 6 | 6 | 5 |
The best time to visit Puerto Iguazú is from March to May and June to September, when temperatures are pleasant (22–28°C), rainfall is moderate, and the waterfalls are impressive but crowds are smaller. These months offer ideal conditions for sightseeing, hiking, and enjoying the lush rainforest, with comfortable weather and vibrant scenery.
The least favourable time to visit is from October to February, when heat, humidity, and heavy rainfall peak. While the waterfalls are at their most dramatic, outdoor activities can be disrupted by frequent storms and muggy conditions. Summer is best for those seeking powerful water flows and don’t mind the humidity.
Puerto Iguazú has a humid subtropical climate with hot, rainy summers and mild, wet winters. Rain falls year-round, with no true dry season. Humidity is high, and temperatures are warm even in winter.
The best time to visit is from March to May and June to September, when temperatures are comfortable, rainfall is moderate, and the crowds are smaller. These months offer ideal conditions for sightseeing and hiking.
Yes, Puerto Iguazú receives abundant rainfall year-round, averaging about 1,950–2,000 mm annually. The wettest months are October, November, and December, but even the driest months see significant rain.
Summer highs typically reach 30–32°C, with January being the hottest month. Heatwaves can push temperatures above 36°C, and humidity is high, making it feel even hotter.
Yes, humidity is consistently high, averaging 75–80% throughout the year. The air feels muggy in summer, and even in winter, humidity remains elevated due to frequent rainfall and lush vegetation.
Winters are mild, with highs of 22–25°C and lows rarely dropping below 10°C. Frost is rare but can occur during cold spells. Snow does not occur in Puerto Iguazú.
Pack light, breathable clothing, rain gear, and sturdy waterproof shoes. Bring insect repellent and sun protection. Evenings can be cooler after rain, so a light jumper is useful year-round.
The warmest month, with the highest average maximum temperature, is January (31.2 °C). The month with the lowest average maximum temperature is June (22.1 °C). Overall, the average maximum temperature over the whole year is 27.3 °C.
The month with the highest average minimum temperature is January (20.9 °C). The coldest month, with the lowest average minimum temperature, is July (11.1 °C). Overall, the average minimum temperature over the whole year is 16.1 °C.
The wettest month, with the highest amount of precipitation, is October (264.3 mm). The driest month, with the least amount of precipitation, is August (81.8 mm). Over the whole year there are 1,902.4 mm of rainfall on average.
The month with the most days of rain is October (10.9 days). The month with the fewest days of rain is August (6.2 days). Over the whole year there are 98.2 days of rain on average.
The month with the highest average relative humidity is June (83.6 %). The month with the lowest average relative humidity is December (72.4 %). The overall average relative humidity over the whole year is 78 %.
The month with the longest days, so the most daylight, is December (Average daylight: 13.1 h). The months with the shortest days, so the least daylight, are June and July (Average daylight: 10.1 h). Over the whole year there are 11.7 h of daylight per day on average.
The month with the most sunshine per day is January (Average sunshine: 6.1 h). The month with the least sunshine per day is September (Average sunshine: 2.9 h). Over the whole year there are 4.7 h of sunlight per day on average.
