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Ilha Grande Weather in December
Ilha Grande in December sees high temperatures, with highs around 27°C (81°F) and overnight lows of 23°C (73°F). With the rainy season in full effect, expect around 181 mm (7.1 in) of rainfall and regular showers throughout the month.
Rainfall in Ilha Grande in December
As part of the rainy season, Ilha Grande sees around 21 days of rain in December, with an average of 181 mm (7.1 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Ilha Grande in December
December in Ilha Grande brings typical temperatures with highs around 27°C (81°F) and lows of 23°C (73°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 23°C (73°F) overnight, nights are warm enough to sit outside comfortably in light clothing.Should you favor a climate that's both dry and comfortably warm, May, June, July and August typically offer the most agreeable 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 December
Min Temperature
23°C (73°F)
Max Temperature
27°C (81°F)
Chance of Rain
68%
Precipitation
181 mm (7.1 in)
Rainy days
21 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 December, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in December
Historical weather records for Ilha Grande in December
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 December
Our historical data for Ilha Grande spans 2002 to 2025, revealing these weather extremes.
- The warmest day in December was on December 7, 2023, with a maximum of 39°C (102°F).
- Ilha Grande experienced its chilliest December day on December 22, 2004, reaching only 20°C (68°F).
- Ilha Grande registered its coldest December night on December 24, 2024, with temperatures dropping to 12°C (54°F).
Best Places in Brazil in December
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in December →
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 December
Warm but pleasant conditions in Ilha Grande in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.
What To Do in Ilha Grande in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
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 December
Where to go in December - average daytime high across popular destinations.
Fortaleza
31°C (88°F) Rio de Janeiro
30°C (86°F) Salvador
29°C (84°F) Búzios
27°C (81°F) Gramado28°C (82°F) Florianópolis28°C (82°F) Sao Paulo28°C (82°F) Paraty27°C (81°F) Bucket list
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