Caernarfon weather in July 2026

Expect daytime maximum temperatures of 18°C in Caernarfon, Wales in July based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 99 mm of rainfall in the month.

  • 18°C maximum daytime temperature in July in Caernarfon18
    18°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in July in Caernarfon14
    14 days with some rainfall
  • 11°C minimum night-time temperature in July in Caernarfon11
    11°C min night temperature
  • 16 hours of daylight per day in July in Caernarfon16
    16 hours of daylight per day
  • No heat & humidity in July in Caernarfon0
    No heat & humidity
  • 99 mm monthly rainfall in July in Caernarfon99
    99 mm of monthly rainfall
  • UV (maximum) index 6 (High) in July in Caernarfon6
    6 (High) UV index
  • 15°C sea temperature in July in Caernarfon15
    15°C sea temperature

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The July weather guide for Wales (Caernarfon) 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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More about Wales

How hot is it in Caernarfon in July?

Daytime temperatures usually reach 18°C in Caernarfon in July, falling to 11°C at night.

How sunny is it in Caernarfon in July?

There are normally 6 hours of bright sunshine each day in Caernarfon in July - that's 34% of daylight hours.

How warm is the sea around Caernarfon in July?

The average sea temperature around Caernarfon in July is 15°C.

Does it rain in Caernarfon in July?

There are usually 14 days with some rain in Caernarfon in July and the average monthly rainfall is 99mm.

Caernarfon July sunrise & sunset times

Browse the sunrise and sunset times for Caernarfon in July 2026. Select a month to view Caernarfon sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st July 2026 03:55 20:47
Thursday, 16th July 2026 04:10 20:35
Friday, 31st July 2026 04:33 20:13

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