Marco Island weather in September 2025

Expect 32°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Marco Island in September. Check more long-term weather averages for Marco Island in September before you book your next holiday to Florida in 2025/2026.

  • 32°C maximum daytime temperature in September in Marco Island32
    32°C max day temperature
  • 9 hours of sunshine per day
  • 15 days with some rainfall in September in Marco Island15
    15 days with some rainfall
  • 23°C minimum night-time temperature in September in Marco Island23
    23°C min night temperature
  • 12 hours of daylight per day in September in Marco Island12
    12 hours of daylight per day
  • Very high heat & humidity in September in Marco IslandVH
    Very High heat & humidity
  • 206 mm monthly rainfall in September in Marco Island206
    206 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Marco Island10
    10 (Very High) UV index
  • 29°C sea temperature in September in Marco Island29
    29°C sea temperature

More about Marco Island

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The September weather guide for Florida (Marco Island) 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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More about Florida

How hot is it in Marco Island in September?

Daytime temperatures usually reach 32°C in Marco Island in September with very high heat and humidity, falling to 23°C at night.

How sunny is it in Marco Island in September?

There are normally 9 hours of bright sunshine each day in Marco Island in September - that's 69% of daylight hours.

How warm is the sea around Marco Island in September?

The average sea temperature around Marco Island in September is 29°C.

Does it rain in Marco Island in September?

There are usually 15 days with some rain in Marco Island in September and the average monthly rainfall is 206mm.

What is the chance of a hurricane in Marco Island in September?

On average 1 day in September in Marco Island is likely to be affected by the passage of one or more tropical storms.

Marco Island September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:07 18:46
Monday, 15th September 2025 06:13 18:31
Tuesday, 30th September 2025 06:19 18:14

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