Barmouth weather in May 2026

Expect daytime maximum temperatures of 14°C in Barmouth, Wales in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 101 mm of rainfall in the month.

  • 14°C maximum daytime temperature in May in Barmouth14
    14°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Barmouth16
    16 days with some rainfall
  • 6°C minimum night-time temperature in May in Barmouth6
    6°C min night temperature
  • 16 hours of daylight per day in May in Barmouth16
    16 hours of daylight per day
  • No heat & humidity in May in Barmouth0
    No heat & humidity
  • 101 mm monthly rainfall in May in Barmouth101
    101 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Barmouth5
    5 (Moderate) UV index
  • 12°C sea temperature in May in Barmouth12
    12°C sea temperature

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The May weather guide for Wales (Barmouth) 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 warm is it in Barmouth in May?

Daytime temperatures usually reach 16°C in Barmouth in May, falling to 7°C at night.

How sunny is it in Barmouth in May?

There are normally 6 hours of bright sunshine each day in Barmouth in May - that's 41% of daylight hours.

How warm is the sea around Barmouth in May?

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

Does it rain in Barmouth in May?

There are usually 15 days with some rain in Barmouth in May and the average monthly rainfall is 65mm.

Barmouth May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 04:44 19:44
Saturday, 16th May 2026 04:18 20:08
Sunday, 31st May 2026 03:59 20:29

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