Cardiff weather in May (Wales, United Kingdom)
How is May weather typically in Cardiff, the United Kingdom? Here’s all you need to know to plan your visit.
Temperatures
In May, Cardiff usually has moderate temperatures and moderate rainfall. Expect the temperatures during the day to hover around 16°C. At night, they will likely drop to about 9°C.
Precipitation
Cardiff in May usually receives moderate rainfall, averaging around 79 mm for the month. Historically, approximately 15 days this month are expected to have rain.
Average sunshine
Expect sunny days throughout the month, with an estimated 197 hours of sunshine. This makes it a pleasant time to visit Cardiff.
Average windspeed
In May, average wind speeds reach 4 m/s, leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.
Average water temperature in May
At 11°C, the water temperature remains quite cold and requires thermal protection for swimming.For Cardiff itself, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Select a Month of Interest
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our Cardiff's climate page.
Cardiff, monthly averages in May
Min Temperature
9°C
Max Temperature
16°C
Water Temperature
11°C
Chance of Rain
51%
Precipitation
79 mm
Rainy days
15 days
Humidity
74%
Windspeed
4 m/s
Sunshine
197 hours
Percentage Sunshine
41%
Where to go in the United Kingdom in May
Find out more about the weather in the United Kingdom and which places have the best travel conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
Select a Month of Interest
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our Cardiff's climate page.
So, what should you wear in this month?
Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay. With a water temperature of around 11°C there is no need to bring your swimwear.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in Cardiff.
Our site offers climate and forecast data for every country in the world. Are you going to the United Kingdom? On this website you can find 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.
