Wales Weather in May

Average temperatures, rainfall, sunshine and the best places to visit in Wales, the United Kingdom in May.

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Cardiff Swansea

Considering a trip to Wales, the United Kingdom this May and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Wales in May

Wales, the United Kingdom 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 (61°F) and nighttime temperatures around 9°C (48°F) in Cardiff.

For specific regional insights in Wales, the United Kingdom, refer to the map provided below.

Precipitation

In May, precipitation varies across different areas. From moderate rainfall in Cardiff with an average of 79 mm (3.1 in) to moderate rainfall in Swansea with 86 mm (3.4 in).

Average sunshine

Plenty of sunshine can be expected in numerous places in May. Cardiff typically receives 197 hours of sunlight, making it ideal for those seeking sunny weather.

Explore Wales by month

Pick a month to see the average temperature, rainfall and sunshine in Wales — and find the best time to visit. (based on Cardiff)

January9°C (48°F) February9°C (48°F) March11°C (52°F) April13°C (55°F) May16°C (61°F) June18°C (64°F) This monthJuly20°C (68°F) August20°C (68°F) September18°C (64°F) October15°C (59°F) November12°C (54°F) December10°C (50°F)
Best Time to Visit Wales →

Best Places to Visit in Wales in May

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Wales.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Wales

What is the weather like in May for some of the most popular destinations in Wales, the United Kingdom?

Temperature range in Wales (May)

Precipitation variation in Wales (May)

Cardiff

In May Cardiff generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
13°C (55°F)
16°C (61°F)
18°C (64°F)
Min temperature
6°C (43°F)
9°C (48°F)
12°C (54°F)
Monthly sun hours
180 hours
197 hours
194 hours
Monthly rainfall
78 mm (3.1 in)
79 mm (3.1 in)
82 mm (3.2 in)
Monthly rainy days
15 days
15 days
14 days
Weather conditions
unpleasant
tolerable
pleasant
Climate in Cardiff →

Swansea

In May Swansea generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 9°C (48°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« April
May
June »
April
May
June
Max temperature
13°C (55°F)
16°C (61°F)
18°C (64°F)
Min temperature
6°C (43°F)
9°C (48°F)
11°C (52°F)
Monthly sun hours
180 hours
197 hours
194 hours
Monthly rainfall
83 mm (3.3 in)
86 mm (3.4 in)
94 mm (3.7 in)
Monthly rainy days
14 days
15 days
15 days
Weather conditions
unpleasant
tolerable
pleasant
Climate in Swansea →

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

Popular cities in May

Day & night temperatures, rainfall and average weather in Wales in May.

City Weather Day temp Night temp Rainfall
Cardiff 16°C (61°F) 9°C (48°F) 79 mm (3.1 in)
Swansea 16°C (61°F) 9°C (48°F) 86 mm (3.4 in)

Wales weather in May: frequently asked questions

What is the weather like in Wales, the United Kingdom in May?

In May, Wales, the United Kingdom generally has tolerable weather conditions. Cardiff sees daytime temperatures near 16°C (61°F), with nights cooling to roughly 9°C (48°F).

What is the average temperature in Wales, the United Kingdom in May?

Average temperatures in Wales, the United Kingdom during May range from a nighttime low near 9°C (48°F) to a daytime high around 16°C (61°F) in Cardiff.

Does Wales, the United Kingdom get a lot of rain in May?

Rain is generally moderate to light in Wales, the United Kingdom during May, with Cardiff averaging close to 79 mm (3.1 in).

Is May a Good Time to Visit Wales, the United Kingdom?

Given the typically tolerable weather conditions in Cardiff, May might be a good time to visit Wales, the United Kingdom. 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.

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.

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