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Temperature in Wales in May

Wales is a region in the United Kingdom. May is generally a mild month with maximum daytime temperatures around 16°C and nighttime temperatures around 9°C in Cardiff.

What is the temperature of the different cities in Wales in May?

Explore the map below to discover average May temperatures at the top destinations in Wales. For a deeper dive, simply click on any destination dot.

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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • How much sun does Wales get in May?
  • The weather is predominantly sunny, with an estimated total of around 197 hours of sunshine in Cardiff. This means many sunny days, which creates a cheerful atmosphere during this month.

  • What is the water's temperature in May?
  • The water temperature averages approximately 11°C in Cardiff this month, so not the best month to swim.

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