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Ilha Grande Weather in October
Ilha Grande in October sees high daytime temperatures of 25°C (77°F) and nighttime lows of 20°C (68°F). Rainfall is fairly high this month at around 120 mm (4.7 in), so pack a rain jacket to stay dry.
Rainfall in Ilha Grande in October
Records from the past 30 years suggest around 16 days of rain, with 120 mm (4.7 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Ilha Grande in October
In October, Ilha Grande gets high temperatures, with highs of 25°C (77°F). Nights cool to around 20°C (68°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are mild at around 20°C (68°F), which is comfortable for most people.If you prefer enjoying temperate temperatures and rain-free days, May, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Ilha Grande Temperature in October
Min Temperature
20°C (68°F)
Max Temperature
25°C (77°F)
Chance of Rain
55%
Precipitation
120 mm (4.7 in)
Rainy days
16 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
49-year average (1976-2025)
Based on our historical records, temperatures in Ilha Grande typically stay consistent throughout October, with daily highs averaging around 25°C (77°F). Nights are warm, with lows around 20°C (68°F).
Average temperatures in October
Historical weather records for Ilha Grande in October
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 October
Based on weather observations in Ilha Grande between 1999 and 2025, these are the recorded extremes during October.
- Ilha Grande recorded its highest October temperature of 40°C (104°F) on October 15, 2015.
- The lowest daytime temperature in October was 17°C (63°F), recorded on October 6, 2004.
- Ilha Grande registered its coldest October night on October 5, 2014, with temperatures dropping to 14°C (57°F).
Best Places in Brazil in October
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in October →
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 October
For Ilha Grande in October, 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 October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping6/10 -
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 October
Where to go in October - average daytime high across popular destinations.
Fortaleza
31°C (88°F) Rio de Janeiro
28°C (82°F) Salvador
28°C (82°F) Sao Paulo27°C (81°F) Búzios
25°C (77°F) Paraty
25°C (77°F) Gramado24°C (75°F) Florianópolis24°C (75°F) Bucket list
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