St Helier weather in August 2021

  • 20°C maximum daytime temperature in August in St Helier20
    20°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in August in St Helier11
    11 days with some rainfall
  • 14°C minimum night-time temperature in August in St Helier14
    14°C min night temperature
  • 14 hours of daylight per day in August in St Helier14
    14 hours of daylight per day
  • No heat & humidity in August in St Helier0
    No heat & humidity
  • 52 mm monthly rainfall in August in St Helier52
    52 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in St Helier6
    6 (High) UV index
  • 18°C sea temperature in August in St Helier18
    18°C sea temperature

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The August weather guide for St Helier, Jersey 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.

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How hot is it in St Helier in August?

Daytime temperatures usually reach 20°C in St Helier in August, falling to 14°C at night.

How sunny is it in St Helier in August?

There are normally 8 hours of bright sunshine each day in St Helier in August - that's 52% of daylight hours.

How warm is the sea around St Helier in August?

The average sea temperature around St Helier in August is 18°C.

Does it rain in St Helier in August?

There are usually 11 days with some rain in St Helier in August and the average monthly rainfall is 52mm.

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

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St Helier sunrise & sunset times for August 2021

Browse the sunrise and sunset times for St Helier in August 2021. Select a month to view St Helier sunrise & sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st August 2021 05:41 20:48
Monday, 16th August 2021 06:02 20:22
Tuesday, 31st August 2021 06:23 19:53

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