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Weather in May in Wales

Are you planning a trip a to Wales in May and wondering what kind of weather to expect? This page has all the details you need.

What is the weather like in Wales in May?

Wales is a region in the United Kingdom. May in Wales generally has mild temperatures, with moderate precipitation.

Temperatures

You can expect mild maximum daytime temperatures of around 16°C and nighttime temperatures around 9°C in Cardiff.

Precipitation

In May, precipitation varies across different areas. From moderate rainfall in Cardiff with an average of 79 mm to moderate rainfall in Swansea with 86 mm.

Average sunshine

Meanwhile, Cardiff enjoys close to 197 hours of sunlight. This means it's a great month if you prefer bright and sunny days.

For specific regional insights in Wales for May, refer to the map provided below. For an in-depth overview of the yearly weather conditions, do visit our Wales climate page.

Where to go in Wales in May

Find more information for the most popular destinations in the Wales on the map below. Click on a destination dot for more detailes.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in May for the 2 most popular destinations in Wales?

Cardiff

In May Cardiff generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 9°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Cardiff
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   April April
<<  
13°C 
6°C 
180 hours 
78 mm 
15 days 
16°C 
9°C 
197 hours 
79 mm 
15 days 
June   >> June
>>  
18°C 
12°C 
194 hours 
82 mm 
14 days 
Climate in Cardiff

Swansea

In May Swansea generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 9°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Swansea
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   April April
<<  
13°C 
6°C 
180 hours 
83 mm 
14 days 
16°C 
9°C 
197 hours 
86 mm 
15 days 
June   >> June
>>  
18°C 
11°C 
194 hours 
94 mm 
15 days 
Climate in Swansea

Is your destination not in the list? Have a look at other destinations in Wales, in the United Kingdom.

Is May the best time to visit Wales?

Given the typically tolerable weather conditions in Cardiff, May might be a good time to visit Wales. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in July and August offering mostly perfect weather in Cardiff. The weather in January, February, November and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Wales. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.