Island in Rio de Janeiro, Brazil
Ilha Grande weather by month and the best time to visit
When to go to Ilha Grande
Apr–Oct is drier and better for hiking. Dec–Mar is hot, rainy and crowded, with the ferry full at New Year and Carnival.
Ilha Grande weather by month
Average daily high, rainfall and conditions.
- Jan30°227 mm
- Feb30°184 mm
- Mar29°177 mm
- Apr28°101 mm
- May26°64 mm
- Jun26°44 mm
- Jul25°47 mm
- Aug26°39 mm
- Sep28°66 mm
- Oct28°120 mm
- Nov28°192 mm
- Dec29°214 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 30°C86°F | 24°C75°F | 227 mm | 83% | Rainy |
| February | 30°C86°F | 24°C75°F | 184 mm | 83% | Rainy |
| March | 29°C84°F | 24°C74°F | 177 mm | 84% | Rainy |
| April | 28°C82°F | 22°C72°F | 101 mm | 84% | Pleasant |
| May | 26°C79°F | 20°C67°F | 64 mm | 82% | Pleasant |
| June | 26°C78°F | 19°C66°F | 44 mm | 81% | Pleasant |
| July | 25°C78°F | 18°C64°F | 47 mm | 78% | Pleasant |
| August | 26°C80°F | 18°C64°F | 39 mm | 76% | Pleasant |
| September | 28°C82°F | 19°C66°F | 66 mm | 76% | Pleasant |
| October | 28°C83°F | 20°C69°F | 120 mm | 79% | Pleasant |
| November | 28°C83°F | 21°C70°F | 192 mm | 82% | Rainy |
| December | 29°C85°F | 23°C73°F | 214 mm | 83% | Rainy |
Best months across Brazil
| Place | Best months | Warmest month |
|---|---|---|
| Rio de Janeiro | Apr–Jun, Sep–Oct | Feb (29°C) |
| São Paulo | Apr–May, Sep–Oct | Oct (27°C) |
| Foz do Iguaçu | Mar–May, Aug–Oct | Jan (32°C) |
| Florianópolis | Feb–Apr, Nov–Dec | Feb (29°C) |
| Salvador | Sep–Feb | Mar (31°C) |
| Jericoacoara | Jul–Dec | Oct (35°C) |
| Ilha Grande | Apr–Jun, Aug–Oct | Jan (30°C) |
| Paraty | Apr–Jun, Aug–Oct | Feb (32°C) |
| Búzios | Apr–Jun, Sep–Nov | Feb (29°C) |
| Fernando de Noronha | Aug–Dec | Apr (28°C) |
| Recife | Sep–Feb | Feb (31°C) |
| Fortaleza | Jul–Dec | Nov (30°C) |
| Manaus | Jun–Oct | Sep (33°C) |
| Pipa | Sep–Feb | Mar (29°C) |
| Natal | Sep–Feb | Mar (29°C) |
| Maceió | Sep–Feb | Mar (30°C) |
| Belo Horizonte | May–Sep | Oct (30°C) |
| Brasília | May–Sep | Sep (31°C) |
| Itacaré | Oct–Mar | Mar (28°C) |
| Morro de São Paulo | Sep–Mar | Mar (29°C) |
| Chapada Diamantina | May–Sep | Oct (34°C) |
| Lençóis Maranhenses | Jun–Sep | Sep (31°C) |
| Bonito | Apr–Sep | Oct (34°C) |
| Ouro Preto | Apr–Sep | Oct (28°C) |
| Curitiba | Mar–May, Sep–Nov | Dec (26°C) |
| Porto Alegre | Mar–May, Sep–Nov | Feb (29°C) |
| Belém | Jul–Nov | Oct (33°C) |
| Balneário Camboriú | Nov–Mar | Feb (29°C) |
| Porto de Galinhas | Sep–Feb | Mar (30°C) |
| Gramado | May–Aug, Dec | Jan (24°C) |
Quick answers
What is the best month to visit Ilha Grande?
Apr–Jun, Aug–Oct. Apr–Oct is drier and better for hiking. Dec–Mar is hot, rainy and crowded, with the ferry full at New Year and Carnival.
When is the rainy season in Ilha Grande?
Rain peaks in January with about 227 mm. Months with 150 mm or more: Nov–Mar.
What is the hottest month in Ilha Grande?
January, with average highs of 30°C (86°F).
How cold does Ilha Grande get?
The coolest nights are in July, averaging 18°C (64°F).
More about Ilha Grande
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 2.8°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.