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Weather in December in Glamorgan

Planning a trip to Glamorgan this December? Here's what you need to know about the weather:

What is the weather like in Glamorgan in December?

Glamorgan is a region in the United Kingdom. December in Glamorgan generally has cold temperatures, with high precipitation. During December, winter is in full swing.

Temperatures

The average maximum temperatures are cold and range from 8°C in Merthyr Tydfil to 10°C in Llangennith. Nighttime temperatures generally drop to 6°C in Llangennith and 2°C in Merthyr Tydfil.

For a closer look at conditions across Glamorgan, refer to the map below.

Precipitation

In December, precipitation varies across different areas. From high rainfall in Penarth with an average of 107 mm to high rainfall in Llangennith with 159 mm. Going by our weather data, it is the wettest month of the year in Cardiff.

Average sunshine

The city Cardiff usually sees around 49 hours of sunlight, indicating fewer sunny days.

For a more detailed look at Glamorgan's conditions throughout the year, check out our Glamorgan climate page.

Where to go in Glamorgan in December

Find more information for the most popular destinations in the Glamorgan on the map below. Click on a destination dot for more details.

Map not visible? Whoops sorry! Please refresh the page.
MarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarkerMarker
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).

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Glamorgan's climate page.

Popular destinations

What is the weather like in December for the 5 most popular destinations in Glamorgan?

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 
Annual   >> Annual
>>  
14°C 
9°C 
1,573 hours 
1138 mm 
197 days 
Climate in Cardiff

Merthyr Tydfil

In December Merthyr Tydfil generally has low temperatures with maximum daytime temperatures around 8°C, minimum nighttime temperatures around 2°C and high monthly rainfall. So on average the conditions are poor that month.

Merthyr Tydfil
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
11°C 
4°C 
66 hours 
115 mm 
20 days 
poor 
8°C 
2°C 
49 hours 
122 mm 
20 days 
poor 
Annual   >> Annual
>>  
14°C 
6°C 
1,573 hours 
1221 mm 
209 days 
Climate in Merthyr Tydfil

Bridgend

In December Bridgend 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.

Bridgend
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 
124 mm 
20 days 
poor 
10°C 
5°C 
49 hours 
130 mm 
20 days 
poor 
Annual   >> Annual
>>  
14°C 
8°C 
1,573 hours 
1196 mm 
207 days 
Climate in Bridgend

The Mumbles

In December The Mumbles 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.

The Mumbles
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 
8°C 
66 hours 
147 mm 
20 days 
poor 
10°C 
5°C 
49 hours 
150 mm 
20 days 
poor 
Annual   >> Annual
>>  
14°C 
9°C 
1,573 hours 
1344 mm 
200 days 
Climate in The Mumbles

Barry

In December Barry 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.

Barry
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 
113 mm 
18 days 
poor 
10°C 
5°C 
49 hours 
115 mm 
19 days 
poor 
Annual   >> Annual
>>  
14°C 
9°C 
1,573 hours 
1113 mm 
195 days 
Climate in Barry

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

Is December the best time to visit Glamorgan?

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

Generally speaking, the best visiting conditions can be found in July and August offering mostly perfect weather in Cardiff. On the other hand, the months of 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 Glamorgan.

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 travel conditions. Find out where to go with our weather planner.