Wales in may: average Weather, Temperature and Climate, Where to go?
Weather in Wales in may 2025
In this section, find the the weather forecast for the month of may for most popular cities in Wales. These datas are statistics for may from weather reports for many years. The percentage indicates the possibility of having the weather indicated.
Average weather in may in Cardiff
tolerable weather
Weather at 6am
50°F
Clear/Sunny
28% of time
28%
28%
7%
Weather at 12pm
59°F
Partly Cloudy
32% of time
28%
27%
12%
Weather at 6pm
58°F
Clear/Sunny
33% of time
31%
18%
15%
Weather at 3am
49°F
29%
25%
17%
11%
Where to go in Wales in may?
Where to go in Wales in may: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in Wales in may when it comes to the weather?
Remember:
The climate in Wales in may is tolerable across the board.
May is not the best month to spend holidays in Wales. The weather in Cardiff, Brecon Beacons (National Park), Pembrokeshire, Conwy and Swansea is just ok. The sun is not there all the time and you might make you wet by rain often. However, if you don't plan a beach and sun travel in Wales but rather discovery of heritage, this climate could be appropriate. In addition, there are surely fewer tourists this month.
It's even worse in Snowdonia National Park and Holyhead and surrounding areas where the climate is very bad. We really do not recommend you to visit these areas this month.
Climate in Wales in may
Climate in Cardiff in may
In may, maximum temperature is 59°F and minimum temperature is 50°F (for an average temperature of 56°F). The climate is rather cold here in the month of may, but it is liveable by dressing hot. With 2.3in over 4 days, rain may occur for your journey. But this is moderate and it is only of temporary showers.
With a correct climate, the month of may is okay (but not the best time) for traveling in Cardiff.
| May | |||
| Average temperature | 56°F | ||
| Highest temperature | 59°F | ||
| Lowest temperature | 50°F | ||
| Sea temperature | 53°F | ||
| Rainfall | 2.3in | ||
| Number of days with rainfall | 4 day(s) (11%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 13 | ||
| Cloud cover | 47% | ||
| Length of day | 15:37 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Brecon Beacons (National Park) in may
In may, the mean temperature in Brecon Beacons (National Park) is 52°F (maximum temperature is 58°F and minimum temperature is 47°F). The climate is relatively cool in this location in this month, but it is bearable by dressing warm. With 4.2in over 7 days, you risk getting wet slightly for your vacations. But this is reasonably and you will not be too bothered by it.
With a correct weather, the month of may is okay (but not the best month) for traveling in this city.
| May | |||
| Average temperature | 52°F | ||
| Highest temperature | 58°F | ||
| Lowest temperature | 47°F | ||
| Rainfall | 4.2in | ||
| Number of days with rainfall | 7 day(s) (22%) | ||
| Humidity | 92% | ||
| Daily sunshine hours | 13 | ||
| Cloud cover | 58% | ||
| Length of day | 15:42 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Conwy in may
In may, maximum temperature is 58°F and minimum temperature is 50°F (for an average temperature of 54°F). The climate is fairly cold here in may, but it is liveable when dressing hot. With 3.6in over 7 days, you will experience some showers throughout your stay. But this is rather moderate and you will not be too bothered by it.
With proper weather, may is okay (but not the best time) for traveling in this city in Wales.
| May | |||
| Average temperature | 54°F | ||
| Highest temperature | 58°F | ||
| Lowest temperature | 50°F | ||
| Sea temperature | 52°F | ||
| Rainfall | 3.6in | ||
| Number of days with rainfall | 7 day(s) (22%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 13 | ||
| Cloud cover | 50% | ||
| Length of day | 15:54 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Holyhead in may
In may, the mean temperature in Holyhead is 54°F (maximum temperature is 56°F and minimum temperature is 50°F). The climate is rather fresh in this city in the month of may, but it is endurable by dressing warm. With 3.8in over 7 days, rainfall can happen throughout your vacations. But this is moderate and you will not be too bothered by it.
With a bad weather, may is not the best time to go in that area in Wales.
| May | |||
| Average temperature | 54°F | ||
| Highest temperature | 56°F | ||
| Lowest temperature | 50°F | ||
| Sea temperature | 51°F | ||
| Rainfall | 3.8in | ||
| Number of days with rainfall | 7 day(s) (21%) | ||
| Humidity | 86% | ||
| Daily sunshine hours | 13 | ||
| Cloud cover | 47% | ||
| Length of day | 15:54 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Pembrokeshire in may
In the month of may, the mean temperature in Pembrokeshire is 54°F (maximum temperature is 58°F and minimum temperature is 52°F). The climate is rather cool in that area in the month of may, but it is liveable when dressing cosy. With 3.5in over 6 days, rain may occur for your trip. But this is reasonably and you will not be too bothered by it.
With a correct climate, may is okay (but not the best month) for traveling in this locality in Wales.
| May | |||
| Average temperature | 54°F | ||
| Highest temperature | 58°F | ||
| Lowest temperature | 52°F | ||
| Sea temperature | 53°F | ||
| Rainfall | 3.5in | ||
| Number of days with rainfall | 6 day(s) (19%) | ||
| Humidity | 86% | ||
| Daily sunshine hours | 13 | ||
| Cloud cover | 45% | ||
| Length of day | 15:39 | ||
| Our opinion at whereandwhen.net | tolerable |
All cities in Wales in may
| Cardiff in may | tolerable weather |
| Brecon Beacons (National Park) in may | tolerable weather |
| Conwy in may | tolerable weather |
| Holyhead in may | tolerable weather |
| Pembrokeshire in may | tolerable weather |
| Snowdonia National Park in may | bad weather |
| Swansea in may | tolerable weather |
| Aberystwyth in may | tolerable weather |
| Amlwch in may | tolerable weather |
| Barmouth in may | tolerable weather |
| Barry in may | tolerable weather |
| Buckley in may | tolerable weather |
| Carmarthen in may | tolerable weather |
| Fishguard in may | tolerable weather |
| Haverfordwest in may | tolerable weather |
| Llandrindod Wells in may | tolerable weather |
| Llandudno in may | tolerable weather |
| Llanelli in may | tolerable weather |
| Merthyr Tydfil in may | tolerable weather |
| Newtown in may | tolerable weather |
| Porthcawl in may | tolerable weather |
Weather data for Wales in may:
Weather data for Wales in may is derived from an average of the weather forecast since 2009 in Wales. There is a margin of error and these forecasts are to be considered as general information only. The weather in Wales can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Wales.