St Helena weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in St Helena in May. Check more long-term weather averages for St Helena in May before you book your next holiday to St Helena & Islands in 2025/2026.

  • 21°C maximum daytime temperature in May in St Helena21
    21°C max day temperature
  • 14 days with some rainfall in May in St Helena14
    14 days with some rainfall
  • 17°C minimum night-time temperature in May in St Helena17
    17°C min night temperature
  • 11 hours of daylight per day in May in St Helena11
    11 hours of daylight per day
  • No heat & humidity in May in St Helena0
    No heat & humidity
  • 71 mm monthly rainfall in May in St Helena71
    71 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in St Helena9
    9 (Very High) UV index
  • 24°C sea temperature in May in St Helena24
    24°C sea temperature

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The May weather guide for St Helena & Islands (St Helena) 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 St Helena in May?

Daytime temperatures usually reach 21°C in St Helena in May, falling to 17°C at night.

How warm is the sea around St Helena in May?

The average sea temperature around St Helena in May is 24°C.

Does it ever rain in St Helena in May?

There are usually 14 days with some rain in St Helena in May and the average monthly rainfall is 71mm.

St Helena May sunrise & sunset times

Browse the sunrise and sunset times for St Helena in May 2025. Select a month to view St Helena sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 06:34 18:05
Friday, 16th May 2025 06:38 18:00
Saturday, 31st May 2025 06:43 17:58

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