Cornwall weather in May 2025

Expect daytime maximum temperatures of 14°C in Cornwall, UK in May based on long-term weather averages. There are 7 hours of sunshine per day on average with 15 days with some rainfall and typically 60 mm of rainfall in the month.

  • 14°C maximum daytime temperature in May in Cornwall (Newquay)14
    14°C max day temperature
  • 7 hours of sunshine per day
  • 15 days with some rainfall in May in Cornwall (Newquay)15
    15 days with some rainfall
  • 8°C minimum night-time temperature in May in Cornwall (Newquay)8
    8°C min night temperature
  • 16 hours of daylight per day in May in Cornwall (Newquay)16
    16 hours of daylight per day
  • No heat & humidity in May in Cornwall (Newquay)0
    No heat & humidity
  • 60 mm monthly rainfall in May in Cornwall (Newquay)60
    60 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Cornwall (Newquay)6
    6 (High) UV index
  • 12°C sea temperature in May in Cornwall (Newquay)12
    12°C sea temperature

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The May weather guide for Cornwall (Newquay) 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.

Top Cornwall destinations

Below are average maximum temperatures at popular countries, regions and places in Cornwall in May. Select a holiday destination to see more weather parameters.

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

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More about the UK

How warm is it in Cornwall in May?

Daytime temperatures usually reach 14°C in Newquay, Cornwall in May, falling to 8°C at night.

How sunny is it in Cornwall in May?

There are normally 7 hours of bright sunshine each day in Newquay, Cornwall in May - that's 44% of daylight hours.

How warm is the sea around Cornwall in May?

The average sea temperature around Newquay, Cornwall in May is 12°C.

Does it rain in Cornwall in May?

There are usually 15 days with some rain in Newquay, Cornwall in May and the average monthly rainfall is 60mm.

Cornwall May sunrise & sunset times

Browse the sunrise and sunset times for Cornwall in May 2025. Select a month to view Cornwall sunrise and sunset times for the next 12 months. The Cornwall sunrise and sunset times shown below are for Newquay.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:55 19:41
Friday, 16th May 2025 04:31 20:03
Saturday, 31st May 2025 04:15 20:22

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