Florianopolis weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Florianopolis in September. Check more long-term weather averages for Florianopolis in September before you book your next holiday to Brazil in 2025/2026.

  • 21°C maximum daytime temperature in September in Florianopolis21
    21°C max day temperature
  • 4 hours of sunshine per day
  • 19 days with some rainfall in September in Florianopolis19
    19 days with some rainfall
  • 15°C minimum night-time temperature in September in Florianopolis15
    15°C min night temperature
  • 12 hours of daylight per day in September in Florianopolis12
    12 hours of daylight per day
  • No heat & humidity in September in Florianopolis0
    No heat & humidity
  • 123 mm monthly rainfall in September in Florianopolis123
    123 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Florianopolis8
    8 (Very High) UV index
  • 18°C sea temperature in September in Florianopolis18
    18°C sea temperature

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The September weather guide for Brazil (Florianopolis) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Florianopolis in September?

Daytime temperatures usually reach 21°C in Florianopolis in September, falling to 15°C at night.

How sunny is it in Florianopolis in September?

There are normally 4 hours of bright sunshine each day in Florianopolis in September - that's 35% of daylight hours.

How warm is the sea around Florianopolis in September?

The average sea temperature around Florianopolis in September is 18°C.

Does it rain in Florianopolis in September?

There are usually 19 days with some rain in Florianopolis in September and the average monthly rainfall is 123mm.

Florianopolis September sunrise & sunset times

Browse the sunrise and sunset times for Florianopolis in September 2025. Select a month to view Florianopolis sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:27 18:01
Monday, 15th September 2025 06:12 18:07
Tuesday, 30th September 2025 05:54 18:14

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