Ascension Island weather in May 2025

Expect 28°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Ascension Island in May. Check more long-term weather averages for Ascension Island in May before you book your next holiday to St Helena & Islands in 2025/2026.

  • 28°C maximum daytime temperature in May in Ascension Island28
    28°C max day temperature
  • 9 hours of sunshine per day
  • 20 days with some rainfall in May in Ascension Island20
    20 days with some rainfall
  • 25°C minimum night-time temperature in May in Ascension Island25
    25°C min night temperature
  • 12 hours of daylight per day in May in Ascension Island12
    12 hours of daylight per day
  • Moderate heat & humidity in May in Ascension IslandM
    Moderate heat & humidity
  • 31 mm monthly rainfall in May in Ascension Island31
    31 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Ascension Island11
    11 (Extreme) UV index
  • 27°C sea temperature in May in Ascension Island27
    27°C sea temperature

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The May weather guide for St Helena & Islands (Ascension 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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How hot is it in Ascension Island in May?

Daytime temperatures usually reach 28°C in Ascension Island in May with moderate heat and humidity, falling to 25°C at night.

How sunny is it in Ascension Island in May?

There are normally 9 hours of bright sunshine each day in Ascension Island in May - that's 72% of daylight hours.

How warm is the sea around Ascension Island in May?

The average sea temperature around Ascension Island in May is 27°C.

Does it ever rain in Ascension Island in May?

There are usually 20 days with some rain in Ascension Island in May and the average monthly rainfall is 31mm.

Ascension Island May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 07:00 18:49
Friday, 16th May 2025 07:02 18:46
Saturday, 31st May 2025 07:05 18:46

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