Temperatures in May
It's cool to moderate in May in Wales with an average temperature of 16°C. Temperatures this month range from a low of 12°C to a high of 18°C. At night, you can expect temperatures between 5°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Wales in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Wales with cool temperatures, averaging around 15°C during the day and nights close to 7°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-May
By mid-May, the average daytime temperature rises to around 16°C, with nights close to 9°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of May
By the end of May, the average daytime temperature in Wales will be around 17°C, with nights close to 10°C. A shower might show up, but overall the weather will be dry and sunny.
Precipitation in May
In May, there is an average of 53 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 37% per day this month. The weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Wales. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Wales in May |
London | ||
|---|---|---|---|
 Average Temperature |
16°C | 18°C | |
 High Temp |
18°C | 21°C | |
| Low Temp |
12°C | 15°C | |
 Total Precipitation |
53 mm | 46 mm | |
| Rainy Days |
11 days | 8 days | |
April
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Wales?
Looking for sun and warm weather? Then May isn’t the best time to be in Wales. The temperature is too low this month for a warm stay.
Temperature records for Wales in May
With 25°C, Wales hit the highest temperature in the last 10 years in May 2017. The lowest daytime temperature in this month was 7°C in 2019. The extreme night temperatures ranged from a low of 0°C to a high of 15°C.
Check out the climate of Wales for all months and discover the best travel time
Curious about the climate in other parts of England? Check out the weather and climate in places like London, Edinburgh, Cornwall, or have a look at other destinations in England.
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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 11 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.
