Marco Island weather in May 2026

Expect daytime maximum temperatures of 86°F in Marco Island, Florida in May and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 4.1 inches of rainfall in the month.

  • 86°F maximum daytime temperature in May in Marco Island86
    86°F max day temperature
  • 10 hours of sunshine per day
  • 8 days with some rainfall in May in Marco Island8
    8 days with some rainfall
  • 68°F minimum night-time temperature in May in Marco Island68
    68°F min night temperature
  • 13 hours of daylight per day in May in Marco Island13
    13 hours of daylight per day
  • High heat & humidity in May in Marco IslandH
    High heat & humidity
  • 4.1 inches monthly rainfall in May in Marco Island4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Marco Island11
    11 (Extreme) UV index
  • 81°F sea temperature in May in Marco Island81
    81°F sea temperature

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The May 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)  |  Imperial (°F)

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More about Florida

How hot is it in Marco Island in May?

Daytime temperatures usually reach 86°F in Marco Island in May with high heat and humidity, falling to 68°F at night.

How sunny is it in Marco Island in May?

There are normally 10 hours of bright sunshine each day in Marco Island in May - that's 77% of daylight hours.

How warm is the sea around Marco Island in May?

The average sea temperature around Marco Island in May is 81°F.

Does it rain in Marco Island in May?

There are usually 8 days with some rain in Marco Island in May and the average monthly rainfall is 4.1 inches.

Marco Island May sunrise & sunset times

Browse the sunrise and sunset times for Marco Island in May 2026. Select a month to view Marco Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:50 18:58
Saturday, 16th May 2026 05:40 19:06
Sunday, 31st May 2026 05:35 19:14

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