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Ilha Grande Weather in May
Ilha Grande in May averages 25°C (77°F) during the day and 20°C (68°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Ilha Grande in May
Based on our climate data of the past 30 years, about 11 days of rain are anticipated, with 98 mm (3.9 in) on average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Ilha Grande in May
Ilha Grande in May has excellent weather. Days reach 25°C (77°F) and nights cool to 20°C (68°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights are mild at around 20°C (68°F), which is comfortable for most people.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Ilha Grande Temperature in May
Min Temperature
20°C (68°F)
Max Temperature
25°C (77°F)
Chance of Rain
37%
Precipitation
98 mm (3.9 in)
Rainy days
11 days
Ilha Grande Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ilha Grande - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ilha Grande typically stay consistent throughout May, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows typically ranging from 17°C (63°F) to 20°C (68°F).
Average temperatures in May
Historical weather records for Ilha Grande in May
Browse day-by-day weather records for Ilha Grande spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ilha Grande historical weather extremes in May
Based on 26 years of weather observations in Ilha Grande between 2000 and 2026, these are the recorded extremes.
- Ilha Grande recorded its highest May temperature of 37°C (99°F) on May 2, 2024.
- On May 27, 2003, Ilha Grande saw its coldest May day with temperatures maxing out at 17°C (63°F).
- The lowest overnight temperature recorded in May was 9°C (48°F) (May 1, 2012).
Best Places in Brazil in May
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in May →
perfect weather
pleasant
tolerable
unpleasant
poor
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).
What to Wear in Ilha Grande in May
For Ilha Grande in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Ilha Grande in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Ilha Grande 3-Day Forecast
More climate data for Ilha Grande
See the full Ilha Grande climate overview or explore weather in Brazil.
Popular in May
Where to go in May - average daytime high across popular destinations.
Fortaleza
31°C (88°F) Salvador
28°C (82°F) Rio de Janeiro
27°C (81°F) Búzios
26°C (79°F) Sao Paulo24°C (75°F) Paraty24°C (75°F) Florianópolis23°C (73°F) Gramado21°C (70°F) Bucket list
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