Guernsey weather in July 2025

Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Guernsey in July. Check more long-term weather averages for Guernsey in July before you book your next holiday to Guernsey in 2025/2026.

  • 19°C maximum daytime temperature in July in Guernsey (St Peter Port)19
    19°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in July in Guernsey (St Peter Port)10
    10 days with some rainfall
  • 13°C minimum night-time temperature in July in Guernsey (St Peter Port)13
    13°C min night temperature
  • 16 hours of daylight per day in July in Guernsey (St Peter Port)16
    16 hours of daylight per day
  • No heat & humidity in July in Guernsey (St Peter Port)0
    No heat & humidity
  • 37 mm monthly rainfall in July in Guernsey (St Peter Port)37
    37 mm of monthly rainfall
  • UV (maximum) index 7 (High) in July in Guernsey (St Peter Port)7
    7 (High) UV index
  • 15°C sea temperature in July in Guernsey (St Peter Port)15
    15°C sea temperature

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The July weather guide for Guernsey, represented by St Peter Port, (St Peter Port) 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 Guernsey in July?

Daytime temperatures usually reach 19°C in St Peter Port, Guernsey in July, falling to 13°C at night.

How sunny is it in Guernsey in July?

There are normally 8 hours of bright sunshine each day in St Peter Port, Guernsey in July - that's 52% of daylight hours.

How warm is the sea around Guernsey in July?

The average sea temperature around St Peter Port, Guernsey in July is 15°C.

Does it rain in Guernsey in July?

There are usually 10 days with some rain in St Peter Port, Guernsey in July and the average monthly rainfall is 37mm.

Guernsey July sunrise & sunset times

Browse the sunrise and sunset times for Guernsey in July 2025. Select a month to view Guernsey sunrise and sunset times for the next 12 months. The Guernsey sunrise and sunset times shown below are for St Peter Port.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:08 20:20
Wednesday, 16th July 2025 04:21 20:10
Thursday, 31st July 2025 04:40 19:52

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