Foz do Iguaçu in May
In May, Foz do Iguaçu averages 23°C (74°F) during the day and 15°C (60°F) at night, with frequent rain — about 15 days of the month see precipitation (153 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
May offers comfortable temperatures in Foz do Iguaçu, with some rain to plan around.
How May compares to the rest of the year in Foz do Iguaçu
May is one of the coolest months in Foz do Iguaçu (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 Foz do Iguaçu
Times shown for Foz do Iguaçu local time (America/Sao_Paulo), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in Foz do Iguaçu — May
Golden-hour and blue-hour windows for the 15th of May, in Foz do Iguaçu's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Foz do Iguaçu 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 (High season) and Foz do Iguaçu's popularity.
Crowds & pricing — May in Foz do Iguaçu
This is a busy month in Foz do Iguaçu — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — May in Foz do Iguaçu
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.
Foz do Iguaçu in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 88°F | 23°C / 74°F | 192 mm | 26 | — |
| February | 30°C / 87°F | 22°C / 72°F | 131 mm | 19 | — |
| March | 29°C / 85°F | 21°C / 69°F | 162 mm | 19 | — |
| April | 27°C / 81°F | 18°C / 65°F | 112 mm | 13 | — |
| May | 23°C / 74°F | 15°C / 60°F | 153 mm | 15 | — |
| June | 22°C / 71°F | 14°C / 57°F | 121 mm | 12 | — |
| July | 23°C / 73°F | 13°C / 56°F | 104 mm | 9 | — |
| August | 25°C / 76°F | 15°C / 58°F | 96 mm | 10 | — |
| September | 27°C / 81°F | 17°C / 63°F | 135 mm | 13 | — |
| October | 29°C / 83°F | 19°C / 66°F | 209 mm | 18 | — |
| November | 30°C / 85°F | 20°C / 68°F | 156 mm | 17 | — |
| December | 31°C / 87°F | 22°C / 72°F | 191 mm | 19 | — |
Other cities with similar May weather
🌍 See the full ranked list of climate twins for Foz do Iguaçu in May →
Frequently asked questions
How hot is Foz do Iguaçu in May?
In May, Foz do Iguaçu averages a high of 23°C (74°F) and a low of 15°C (60°F) — generally mild and pleasant.
Does it rain a lot in Foz do Iguaçu in May?
May is quite rainy in Foz do Iguaçu, with about 15 rainy days on average.
Is May a good time to visit Foz do Iguaçu?
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 Foz do Iguaçu 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 Foz do Iguaçu for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.