Florianópolis weather in September
September in Florianópolis: nice, rainy, with very humid — a great time to visit.
#9 of 12 months in Florianópolis · #386 of 604 destinations to visit in September · comfort 74/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Florianópolis climate normals — September
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 23°C / 73°F | |
| Rainfall | 104 mm / 4.1 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 15°C / 59°F | |
| Sunshine | 7.5 h/day | |
| Daylight | 11.9 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Florianópolis?
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Florianópolis in September — FAQ
- Is September a good time to visit Florianópolis?
- September in Florianópolis: nice, rainy, with very humid — a great time to visit. It ranks #9 of 12 months for Florianópolis on SeasonMap's comfort score (74/100).
- What is the weather like in Florianópolis in September?
- In September, Florianópolis averages a daily high of 21.7°C and a low of 16.3°C, with about 104.4 mm of rain over roughly 13.6 rainy days.
- What is the air quality in Florianópolis in September?
- Florianópolis has a mean US Air Quality Index of about 51 in September.