ClimateForecastDecemberJanuary >>

Wales weather in December

Planning a journey to Wales this December and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Wales in December?

Wales is a region in the United Kingdom. December in Wales generally has cold temperatures, with high precipitation. December falls during the winter season.

You can expect cold maximum daytime temperatures of around 10°C and nighttime temperatures around 5°C in Cardiff.

In December, precipitation varies across different areas. From high rainfall in Cardiff with an average of 119 mm to high rainfall in Swansea with 146 mm. Based on our climate, it is the month with the most precipitation throughout the year in Cardiff. Cardiff experiences limited sunny days, amounting to roughly 49 hours of sunshine. This makes it perfect for those who prefer dimmer, cloudier settings rather than intense sunlit days

To learn more about the conditions in specific areas of Wales in December, check out the map below. For more details on the yearly weather, visit our Wales climate page.

Where to go in Wales in December

Find the average weather conditions in December for the most popular destinations in Wales on the map below. Click on a destination dot for more detailed information.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations in Wales

What is the weather like in December for the 2 most popular destinations in Wales?

Average weather in Cardiff

In December Cardiff generally has low temperatures with maximum daytime temperatures around 10°C, minimum nighttime temperatures around 5°C and high monthly rainfall. So on average the conditions are poor that month.

Cardiff
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
12°C 
7°C 
66 hours 
117 mm 
19 days 
poor 
10°C 
5°C 
49 hours 
119 mm 
19 days 
poor 
January   >> January
>>  
9°C 
4°C 
53 hours 
105 mm 
20 days 
poor 
Climate in Cardiff

Average weather in Swansea

In December Swansea generally has low temperatures with maximum daytime temperatures around 10°C, minimum nighttime temperatures around 5°C and high monthly rainfall. So on average the conditions are poor that month.

Swansea
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
12°C 
7°C 
66 hours 
141 mm 
20 days 
poor 
10°C 
5°C 
49 hours 
146 mm 
20 days 
poor 
January   >> January
>>  
9°C 
4°C 
53 hours 
133 mm 
21 days 
poor 
Climate in Swansea

Is your destination not in the list? Have a look at other destinations in Wales, in the United Kingdom.

Is December the best time to visit Wales?

Given the typically poor weather conditions in Cardiff, December may not be the ideal time to visit Wales.

On average, the best time to visit Wales is in July and August with generally perfect weather in Cardiff. In contrast, January, February, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Wales. Interested in the weather conditions in a specific month? Select the month below.

  • January      
  • February      
  • March      
  • April      
  • May      
  • June      
  • July      
  • August      
  • September      
  • October      
  • November      
  • December      
  • Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed 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 climate conditions. Find out where to go with our weather planner.