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The climate of Wales
According to the Köppen climate classification Wales has a moderate sea climate (type Cfb) with relatively mild winters, quite cold summers and precipitation all year round. However, most of the precipitation falls during the winter. The rugged landscape, the many mountains, hills and valleys make for a beautiful interplay between nature and the elements. Because Wales gets a reasonable amount of rain and frost is uncommon, Wales has a characteristic landscape with green hills, partially covered with trees alternated with rugged brown and grey slopes. Because many depressions reach Wales from the west it gets a lot of rain. The annual amounts of rain vary from 800-1,000 millimeters along the coast to 3,000 millimeters in Snowdonia National Park which is situated in the north west of Wales. This makes Snowdonia one of the wettest places in the United Kingdom and even in Europe. The period from October till March is wetter than the summer months. The further you travel into the interior the bigger the differences in annual precipitation figures are.


Climate information of places and areas in Wales
The climate information on this page is only brief. Specific information about weather and climate can be found on the climate pages per area or town. As for Wales the following climate information is available:

Cambrian Mountains
Snowdonia National Park

Influence of the sea
The supply of relatively warm sea water explains why subzero temperatures are uncommon during the winter. The temperature of the sea water still is about 9-10 degrees Celsius; this has a warming effect on Wales’ coastal places. Because of the large differences in temperatures of the sea and the land cloudy skies and fog make for gray weather conditions in Wales. An entire week without a single sunray is quite possible in the interior. Because of the differences in temperature and the supply of depressions from the Atlantic Ocean fierce winds are not uncommon. The highest parts of Wales get the hardest winds. During the summer the sea water is responsible for a tempering effect on temperatures. Because Wales is located outside the European mainland chances of the supply of warm air from the south or east are much smaller. Whenever it does happen the sea has a tempering effect on temperatures so it doesn’t get as hot as in the interior of France.

Cold summers
On average summers in Wales are cooler than elsewhere in mainland Europe. There is a small chance high pressure areas reach Wales; so there hardly is any supply of warm air. There often are low pressure areas in the vicinity of Wales; or high pressure areas that lie far to the east. When the latter is the case the supply of warm air is tempered by the colder sea water. However, chances of rain and low clouds increase.

Wales is not a summer sun destination. Not only are the temperatures too low to be suitable as a summer sun destination; the total amount of hours of sunshine is also much lower than in popular summer sun destinations. The south western part is reasonably sunny with 1,700 annual hours of sunshine. However, an ever blowing sea wind makes it too cold to enjoy the sunshine. The mountainous interior gets much less sunshine; about 1,100-1,200 hours of sunshine per year. During the darkest years the total amount of sunshine doesn’t even reach 1,000 annual hours of sunshine.

Winters in Wales are reasonably mild. Along the coast subzero temperatures are uncommon. However, in the period from December till March subzero night time temperatures may occur; even during the day light frost may occur. Chances of subzero temperatures are much higher in the interior, especially on the highest peaks which are about 1,000 meters above sea level. Snowfall is more frequent here as well. The higher regions get about 25-35 snowy days per year. Most of the snow falls in Snowdonia, which lives up to its name. The south western part of Wales gets the least amount of snow; 6-10 snowy days per year on average. The total amount of snow is usually a few centimeters here. In the mountains tens of centimeters of snow may fall within 24 hours. This can’t be compared to the amount of snow that falls in the Alps. However, there is a possibility of winter sports in Wales. Most of the tracks are covered with artificial snow. However, you may get lucky enough to go skiing or snowboarding on real snow. Snowstorms may occur in Wales. Snowfall in combination with hard wind can cause dangerous situations, especially in traffic.


Climate figures
The figures below are based on long term weather and climate records. They are an average for the coastal places in Wales. However, some deviations may occur: The north coast is slightly colder, the south west is a little sunnier and the south east is a little warmer. The higher regions in the interior are a few degrees colder, less sunny and much wetter.

temperature (°C)


temperature (°C)
hours of sunshine

average days with precipitation
per month
per month
temperature (°C)
January 8 2 2 19 10
February 7 2 2 15 9
March 9 3 4 17 9
April 11 4 5 14 10
May 15 7 6 13 11
June 19 10 7 13 13
July 20 12 6 12 15
August 20 12 6 14 16
September 18 10 5 14 16
October 14 8 3 17 15
November 10 5 2 18 13
December 8 3 2 20 11
= 0-5 mm ● = 6-30 mm ● = 31-60 mm ● = 61-100 mm ● = 101-200 mm ● = over 200 mm
= 0-0.2 inches ● = 0.2-1.2 inches ● = 1.2-2.4 inches ● = 2.5-4 inches ● = 4.1-8 inches ● = over 8 inches

More climate information
Climate tables are useful but they don’t give an overall picture of the climate and possible weather conditions during a period of time. How high the chances are of hot or cold weather or hurricanes can often not be found in these tables. This is why we offer extra climate information per month. The information below is an average for a large part of Wales. However, there are some deviations. In the mountains there is a higher chance of wintry weather, a smaller chance of warm weather, a higher chance of long lasting precipitation and there is less sunshine. The south western part of Wales gets more sunshine and has a smaller chance of wintry weather or long lasting precipitation.

chance of
(very) hot


chance of
(very) cool
chance of

chance of
chance of
sunny days


click here for the explanation of the symbols


The information at this site was carefully composed from climate data collected by meteorological services, meteorological offices, climate experts and other sources. “More climate info” is based on statistics, climate data and personal experience. No rights can be derived from this site. Weather has no memory and gives no guaranties. Nothing is as changeable and unpredictable as the weather. The authors of this site feel in no way responsible for any damages caused by misinterpretation or other circumstances that may influence your holiday or trip to a certain destination. We provide information, it’s up to the reader to use it to it’s benefit.


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