Iguazu Falls · Month comparison
June vs May
May ranks #1 overall vs June at #8. Shoulder month: pleasantly cool (23C/13C), 30% off summer hotel rates, river flow tapering but still strong.
June
#8 of 12 months
Strong option
Southern winter school holidays mid-month bring Argentine and Brazilian families back — book accommodation early.
- ↑Cool dry mornings ideal for the 7km Upper Trail in one go
- ↑Pantanal/Atlantic Forest birding tours run from Foz
May
#1 of 12 months
Best match
Shoulder month: pleasantly cool (23C/13C), 30% off summer hotel rates, river flow tapering but still strong.
- ↑Hotel Loi Suites Iguazu from USD 180 vs USD 280+ in January
- ↑Argentine Park Upper Trail cool enough for full-day walking
| Factor | June | May |
|---|---|---|
| Weather score | 7 | 8 |
| Value score | 7 | 8 |
| Crowd score | 4 | 7 |
| Events score | 4 | 4 |
| Atmosphere | 7 | 8 |
| Avg high temp | 21°C | 23°C |
| Monthly rain | 105mm | 110mm |
| Daily sunshine | 6hrs | 6hrs |
June trade-offs
- ↓School holidays (~Jun 10-25) peak Argentine domestic tourism
- ↓Cold nights 8-11C — woolens needed
- ↓Helicopter cancellations on foggy mornings
May trade-offs
- ↓Evenings can drop to 10C — bring layers
- ↓Some cataracts already visibly thinning vs Feb
- ↓Boat tours (Macuco) suspend on cold/cloudy days
Scores compare months within Iguazu Falls. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →