St Helier weather in July 2025

Expect 20°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Helier in July. Check more long-term weather averages for St Helier in July before you book your next holiday to Jersey in 2025/2026.

  • 20°C maximum daytime temperature in July in St Helier20
    20°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in July in St Helier10
    10 days with some rainfall
  • 14°C minimum night-time temperature in July in St Helier14
    14°C min night temperature
  • 16 hours of daylight per day in July in St Helier16
    16 hours of daylight per day
  • No heat & humidity in July in St Helier0
    No heat & humidity
  • 42 mm monthly rainfall in July in St Helier42
    42 mm of monthly rainfall
  • UV (maximum) index 7 (High) in July in St Helier7
    7 (High) UV index
  • 17°C sea temperature in July in St Helier17
    17°C sea temperature

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St Helier by month

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The July 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 hot is it in St Helier in July?

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

How sunny is it in St Helier in July?

There are normally 8 hours of bright sunshine each day in St Helier in July - that's 53% of daylight hours.

How warm is the sea around St Helier in July?

The average sea temperature around St Helier in July is 17°C.

Does it rain in St Helier in July?

There are usually 10 days with some rain in St Helier in July and the average monthly rainfall is 42mm.

St Helier July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:08 20:17
Wednesday, 16th July 2025 04:21 20:07
Thursday, 31st July 2025 04:40 19:49

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