Cardiff weather in May 2023

  • 16°C maximum daytime temperature in May in Cardiff16
    16°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in May in Cardiff15
    15 days with some rainfall
  • 7°C minimum night-time temperature in May in Cardiff7
    7°C min night temperature
  • 16 hours of daylight per day in May in Cardiff16
    16 hours of daylight per day
  • No heat & humidity in May in Cardiff0
    No heat & humidity
  • 65 mm monthly rainfall in May in Cardiff65
    65 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Cardiff5
    5 (Moderate) UV index
  • 12°C sea temperature in May in Cardiff12
    12°C sea temperature
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Recommended for Wales

The May weather guide for Wales (Cardiff) 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.

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

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More about the UK

How warm is it in Cardiff in May?

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

How sunny is it in Cardiff in May?

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

How warm is the sea around Cardiff in May?

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

Does it rain in Cardiff in May?

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

Cardiff May sunrise & sunset times

Browse the sunrise and sunset times for Cardiff in May 2023. Select a month to view Cardiff sunrise and sunset times for the next 12 months.


Date Sunrise times Sunset times
Monday, 1st May 2023 05:45 20:35
Tuesday, 16th May 2023 05:20 20:59
Wednesday, 31st May 2023 05:02 21:19

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