St Helier weather in May 2025

Expect 16°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Helier in May. Check more long-term weather averages for St Helier in May before you book your next holiday to Jersey in 2025/2026.

  • 16°C maximum daytime temperature in May in St Helier16
    16°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in May in St Helier13
    13 days with some rainfall
  • 9°C minimum night-time temperature in May in St Helier9
    9°C min night temperature
  • 15 hours of daylight per day in May in St Helier15
    15 hours of daylight per day
  • No heat & humidity in May in St Helier0
    No heat & humidity
  • 56 mm monthly rainfall in May in St Helier56
    56 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in St Helier6
    6 (High) UV index
  • 12°C sea temperature in May in St Helier12
    12°C sea temperature

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The May weather guide for Jersey, represented by St Helier, (St Helier) 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 warm is it in St Helier in May?

Daytime temperatures usually reach 16°C in St Helier in May, falling to 9°C at night.

How sunny is it in St Helier in May?

There are normally 8 hours of bright sunshine each day in St Helier in May - that's 50% of daylight hours.

How warm is the sea around St Helier in May?

The average sea temperature around St Helier in May is 12°C.

Does it rain in St Helier in May?

There are usually 13 days with some rain in St Helier in May and the average monthly rainfall is 56mm.

St Helier May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:47 19:25
Friday, 16th May 2025 04:24 19:46
Saturday, 31st May 2025 04:09 20:04

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