Glamorgan Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Glamorgan, the United Kingdom in January.

Thinking about venturing to Glamorgan, the United Kingdom this January and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Glamorgan in January

Glamorgan, the United Kingdom is a region in the United Kingdom. January in Glamorgan generally has cold temperatures, with precipitation levels ranging from moderate to high. January is a winter month.

Temperatures

You can expect cold maximum daytime temperatures of around 9°C (48°F) and nighttime temperatures around 4°C (39°F) in Cardiff. On average, January is the coldest month of the year in Glamorgan, the United Kingdom. So be prepared and make sure to pack winter cloths.

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

Precipitation

In January, precipitation varies across different areas. From moderate rainfall in Penarth with an average of 96 mm (3.8 in) to high rainfall in Crynant with 144 mm (5.7 in).

Average sunshine

Sunshine is more restricted in many locations in January. Cardiff sees roughly 53 hours of sunlight. Our weather planner can help you find destinations with more sunshine if needed.

Explore Glamorgan by month

Pick a month to see the average temperature, rainfall and sunshine in Glamorgan - and find the best time to visit. (based on Cardiff)

Best Places to Visit in Glamorgan in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Glamorgan.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Glamorgan

What is the weather like in January for some of the most popular destinations in Glamorgan, the United Kingdom?

Temperature range in Glamorgan (January)

Precipitation variation in Glamorgan (January)

Cardiff

In January Cardiff generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 4°C (39°F) and high monthly rainfall. So on average the conditions are less favorable that month.

December
January
February
Max temperature
10°C (50°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
4°C (39°F)
4°C (39°F)
Monthly sun hours
49 hours
53 hours
78 hours
Monthly rainfall
119 mm (4.7 in)
105 mm (4.1 in)
90 mm (3.5 in)
Monthly rainy days
19 days
20 days
15 days
Weather conditions

Merthyr Tydfil

In January Merthyr Tydfil generally has low temperatures with maximum daytime temperatures around 8°C (46°F), minimum nighttime temperatures around 2°C (36°F) and high monthly rainfall. So on average the conditions are less favorable that month.

December
January
February
Max temperature
8°C (46°F)
8°C (46°F)
8°C (46°F)
Min temperature
2°C (36°F)
2°C (36°F)
2°C (36°F)
Monthly sun hours
49 hours
53 hours
78 hours
Monthly rainfall
122 mm (4.8 in)
114 mm (4.5 in)
100 mm (3.9 in)
Monthly rainy days
20 days
21 days
16 days
Weather conditions

Bridgend

In January Bridgend generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 4°C (39°F) and high monthly rainfall. So on average the conditions are less favorable that month.

December
January
February
Max temperature
10°C (50°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
4°C (39°F)
4°C (39°F)
Monthly sun hours
49 hours
53 hours
78 hours
Monthly rainfall
130 mm (5.1 in)
117 mm (4.6 in)
98 mm (3.9 in)
Monthly rainy days
20 days
21 days
16 days
Weather conditions

The Mumbles

In January The Mumbles generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 5°C (41°F) and high monthly rainfall. So on average the conditions are less favorable that month.

December
January
February
Max temperature
10°C (50°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
5°C (41°F)
4°C (39°F)
Monthly sun hours
49 hours
53 hours
78 hours
Monthly rainfall
150 mm (5.9 in)
135 mm (5.3 in)
110 mm (4.3 in)
Monthly rainy days
20 days
20 days
15 days
Weather conditions

Barry

In January Barry generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 4°C (39°F) and high monthly rainfall. So on average the conditions are less favorable that month.

December
January
February
Max temperature
10°C (50°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
4°C (39°F)
4°C (39°F)
Monthly sun hours
49 hours
53 hours
78 hours
Monthly rainfall
115 mm (4.5 in)
102 mm (4 in)
88 mm (3.5 in)
Monthly rainy days
19 days
20 days
15 days
Weather conditions

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

In our records: the United Kingdom January extremes

Notable January records observed across cities in the United Kingdom in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • Based on our data, the coldest January night in the United Kingdom dropped to -20°C (-4°F) in Birmingham on January 14, 1982.

Popular cities in January

Day & night temperatures, rainfall and average weather in Glamorgan in January.

City Weather Day temp Night temp Rainfall
Cardiff 9°C (48°F) 4°C (39°F) 105 mm (4.1 in)
Merthyr Tydfil 8°C (46°F) 2°C (36°F) 114 mm (4.5 in)
Bridgend 9°C (48°F) 4°C (39°F) 117 mm (4.6 in)
The Mumbles 9°C (48°F) 5°C (41°F) 135 mm (5.3 in)
Barry 9°C (48°F) 4°C (39°F) 102 mm (4 in)
Cowbridge 9°C (48°F) 4°C (39°F) 111 mm (4.4 in)

Glamorgan weather in January: frequently asked questions

What is the weather like in Glamorgan, the United Kingdom in January?

In January, Glamorgan, the United Kingdom generally has less favorable weather conditions. Cardiff sees daytime temperatures near 9°C (48°F), with nights cooling to roughly 4°C (39°F).

What is the average temperature in Glamorgan, the United Kingdom in January?

Cardiff averages a daytime maximum of 9°C (48°F) in January, with overnight lows close to 4°C (39°F).

Does Glamorgan, the United Kingdom get a lot of rain in January?

Yes, January tends to be a wetter month in Glamorgan, the United Kingdom. Average rainfall in Cardiff sits around 105 mm (4.1 in).

Is January a Good Time to Visit Glamorgan, the United Kingdom?

Given the typically less favorable weather conditions in Cardiff, January may not be the ideal time to visit Glamorgan, the United Kingdom.

On average, the best time to visit Glamorgan, the United Kingdom is in July and August with generally excellent weather in Cardiff. On the other hand, the weather in January, February, November and December tend to be less favorable.

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.

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