St Helena & Islands 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 & Islands in May. Check more long-term weather averages for St Helena & Islands in May before you book your next holiday to St Helena & Islands in 2025/2026.

  • 21°C maximum daytime temperature in May in St Helena & Islands (St Helena)21
    21°C max day temperature
  • 14 days with some rainfall in May in St Helena & Islands (St Helena)14
    14 days with some rainfall
  • 17°C minimum night-time temperature in May in St Helena & Islands (St Helena)17
    17°C min night temperature
  • 11 hours of daylight per day in May in St Helena & Islands (St Helena)11
    11 hours of daylight per day
  • No heat & humidity in May in St Helena & Islands (St Helena)0
    No heat & humidity
  • 71 mm monthly rainfall in May in St Helena & Islands (St Helena)71
    71 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in St Helena & Islands (St Helena)9
    9 (Very High) UV index
  • 24°C sea temperature in May in St Helena & Islands (St Helena)24
    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.

Top St Helena & Islands destinations

Below are average maximum temperatures at popular countries, regions and places in St Helena & Islands in May. Select a holiday destination to see more weather parameters.

All St Helena & Islands destinations

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

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How hot is it in St Helena & Islands in May?

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

How warm is the sea around St Helena & Islands in May?

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

Does it ever rain in St Helena & Islands in May?

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

St Helena & Islands May sunrise & sunset times

Browse the sunrise and sunset times for St Helena & Islands in May 2025. Select a month to view St Helena & Islands sunrise and sunset times for the next 12 months. The St Helena & Islands sunrise and sunset times shown below are for St Helena.

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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