Ilhabela in September
In September, Ilhabela averages 25°C (77°F) during the day and 19°C (67°F) at night, with frequent rain — about 18 days of the month see precipitation (105 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in Ilhabela, with some rain to plan around.
How September compares to the rest of the year in Ilhabela
September is in the middle of the year for warmth in Ilhabela (8th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature runs 1°C below the annual average (26°C). September runs 1°C warmer than August (24°C) and warms a further 1°C into October (26°C).
September sunrise & sunset in Ilhabela
Times shown for Ilhabela local time (America/Sao_Paulo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Ilhabela — September
Golden-hour and blue-hour windows for the 15th of September, in Ilhabela's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Ilhabela in September
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 September's tier (Shoulder) and Ilhabela's popularity.
Crowds & pricing — September in Ilhabela
Ilhabela is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Ilhabela
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.
Ilhabela in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 29°C / 85°F | 24°C / 75°F | 206 mm | 26 | — |
| February | 29°C / 85°F | 24°C / 75°F | 214 mm | 24 | — |
| March | 29°C / 83°F | 23°C / 74°F | 207 mm | 25 | — |
| April | 27°C / 80°F | 21°C / 70°F | 112 mm | 20 | — |
| May | 25°C / 76°F | 19°C / 67°F | 100 mm | 18 | — |
| June | 24°C / 75°F | 18°C / 65°F | 73 mm | 14 | — |
| July | 24°C / 75°F | 17°C / 63°F | 62 mm | 12 | — |
| August | 24°C / 75°F | 18°C / 64°F | 84 mm | 16 | — |
| September | 25°C / 77°F | 19°C / 67°F | 105 mm | 18 | — |
| October | 26°C / 78°F | 20°C / 69°F | 135 mm | 23 | — |
| November | 26°C / 79°F | 21°C / 69°F | 171 mm | 25 | — |
| December | 28°C / 83°F | 23°C / 73°F | 173 mm | 23 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Ilhabela in September →
Frequently asked questions
How hot is Ilhabela in September?
In September, Ilhabela averages a high of 25°C (77°F) and a low of 19°C (67°F) — generally warm.
Does it rain a lot in Ilhabela in September?
September is quite rainy in Ilhabela, with about 18 rainy days on average.
Is September a good time to visit Ilhabela?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Ilhabela in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Ilhabela for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.