Iguazú Falls in May
In May, Iguazú Falls averages 23°C (74°F) during the day and 15°C (59°F) at night, with frequent rain — about 16 days of the month see precipitation (174 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
May offers comfortable temperatures in Iguazú Falls, with some rain to plan around.
How May compares to the rest of the year in Iguazú Falls
May is one of the coolest months in Iguazú Falls (10th of 12) and moderately rainy compared to the rest of the year (7th of 12). Daytime temperature runs 4°C below the annual average (27°C). May runs 4°C cooler than April (27°C) and cools 1°C in June (22°C).
May sunrise & sunset in Iguazú Falls
Times shown for Iguazú Falls local time (America/Argentina/Cordoba), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in Iguazú Falls — May
Golden-hour and blue-hour windows for the 15th of May, in Iguazú Falls's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Iguazú Falls in May
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on May's tier (Shoulder) and Iguazú Falls's popularity.
Crowds & pricing — May in Iguazú Falls
Iguazú Falls is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — May in Iguazú Falls
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Iguazú Falls in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 23°C / 73°F | 218 mm | 26 | — |
| February | 31°C / 87°F | 22°C / 71°F | 147 mm | 20 | — |
| March | 29°C / 85°F | 21°C / 69°F | 172 mm | 20 | — |
| April | 27°C / 81°F | 18°C / 65°F | 130 mm | 14 | — |
| May | 23°C / 74°F | 15°C / 59°F | 174 mm | 16 | — |
| June | 22°C / 72°F | 14°C / 57°F | 131 mm | 12 | — |
| July | 23°C / 73°F | 13°C / 56°F | 98 mm | 9 | — |
| August | 25°C / 77°F | 15°C / 59°F | 95 mm | 10 | — |
| September | 28°C / 82°F | 17°C / 63°F | 132 mm | 14 | — |
| October | 29°C / 83°F | 19°C / 66°F | 219 mm | 19 | — |
| November | 30°C / 85°F | 20°C / 67°F | 164 mm | 17 | — |
| December | 31°C / 87°F | 22°C / 71°F | 206 mm | 20 | — |
Other cities with similar May weather
🌍 See the full ranked list of climate twins for Iguazú Falls in May →
Frequently asked questions
How hot is Iguazú Falls in May?
In May, Iguazú Falls averages a high of 23°C (74°F) and a low of 15°C (59°F) — generally mild and pleasant.
Does it rain a lot in Iguazú Falls in May?
May is quite rainy in Iguazú Falls, with about 16 rainy days on average.
Is May a good time to visit Iguazú Falls?
May is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Iguazú Falls in May?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full May packing list for Iguazú Falls for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.