St Simons Island weather in May 2026

Expect daytime maximum temperatures of 28°C in St Simons Island, Georgia (USA) in May based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 89 mm of rainfall in the month.

  • 28°C maximum daytime temperature in May in St Simons Island28
    28°C max day temperature
  • 10 hours of sunshine per day
  • 8 days with some rainfall in May in St Simons Island8
    8 days with some rainfall
  • 18°C minimum night-time temperature in May in St Simons Island18
    18°C min night temperature
  • 14 hours of daylight per day in May in St Simons Island14
    14 hours of daylight per day
  • Moderate heat & humidity in May in St Simons IslandM
    Moderate heat & humidity
  • 89 mm monthly rainfall in May in St Simons Island89
    89 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in May in St Simons Island10
    10 (Very High) UV index
  • 23°C sea temperature in May in St Simons Island23
    23°C sea temperature

More about St Simons Island

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The May weather guide for Georgia (USA) (St Simons 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 the USA

How hot is it in St Simons Island in May?

Daytime temperatures usually reach 28°C in St Simons Island in May with moderate heat and humidity, falling to 18°C at night.

How sunny is it in St Simons Island in May?

There are normally 10 hours of bright sunshine each day in St Simons Island in May - that's 70% of daylight hours.

How warm is the sea around St Simons Island in May?

The average sea temperature around St Simons Island in May is 23°C.

Does it rain in St Simons Island in May?

There are usually 8 days with some rain in St Simons Island in May and the average monthly rainfall is 89mm.

St Simons Island May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:41 19:05
Saturday, 16th May 2026 05:29 19:15
Sunday, 31st May 2026 05:22 19:24

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