Normal weather for Wales in May
It's pleasantly warm in May in Wales with an average temperature of 22°C. Temperatures this month range from a low of 18°C to a high of 28°C. At night, you can expect temperatures between 6°C and 17°C.
In May, there is an average of 127 mm of precipitation, spread over 14 days. The wind speed is around 4 Bft, mostly coming from the South.
Wales in May |
London | ||
|---|---|---|---|
 Average Temperature |
22°C | 18°C | |
 High Temp |
28°C | 21°C | |
| Low Temp |
18°C | 15°C | |
 Total Precipitation |
127 mm | 46 mm | |
| Rainy Days |
14 days | 8 days | |
Start of May
The month of May starts in Wales with mild temperatures, averaging around 21°C during the day and nights close to 10°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Mid-May
By mid-May, the average daytime temperature stays the same at 21°C, with nights close to 12°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
Temperatures vary between day and night, so it’s smart to wear layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
End of May
By the end of May, the average daytime temperature in Wales will be around 25°C, with nights close to 15°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Wales?
After some sun? Then May isn’t the best time to be in Wales. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Wales in May
With 33°C, Wales hit the highest temperature in the last 10 years in May 2020. The lowest daytime temperature in this month was 4°C in 2020. The extreme night temperatures ranged from a low of -2°C to a high of 23°C.
Check out the climate of Wales for all months and discover the best travel time
April
Daily Temperature in May in Wales
This chart shows the average daily temperatures, both day and night, for each day in May in Wales, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Wales
The chart below shows the average daily precipitation in May for Wales, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 14 days of rain in Wales.
Daily UV Index in May in Wales
This chart shows the average daily UV index in May in Wales, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Wales Over the Years
This chart shows the average temperature in May in Wales, measured in degrees Celsius, over the past years.
Total Precipitation in May in Wales Over the Years
This chart shows the average precipitation in May in Wales, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Wales
Click on a specific day in May for detailed info on the typical weather on that day in Wales. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Wales
Have you been to Wales in May?
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Average Weather in Wales by Month
Click on a month below to see detailed weather info for Wales. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
