Gwynedd Weather in January

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

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Llandudno Criccieth Conwy Holyhead

Thinking about venturing to Gwynedd, 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 Gwynedd in January

Gwynedd, the United Kingdom is a region in the United Kingdom. January in Gwynedd generally has cold temperatures, with precipitation levels ranging from moderate to heavy. January falls during the winter season.

Temperatures

The average maximum temperatures are cold and range from 7°C (45°F) in Llandderfel to 10°C (50°F) in Aberdaron. Nighttime temperatures generally drop to 6°C (43°F) in Aberdaron and 2°C (36°F) in Llandderfel. On average, January is the coldest month of the year in Gwynedd, the United Kingdom. So be prepared and make sure to pack winter cloths.

To explore the conditions in Gwynedd, the United Kingdom in more detail, check the map below.

Precipitation

In January, precipitation varies across different areas. From moderate rainfall in Colwyn Bay with an average of 87 mm (3.4 in) to heavy rainfall in Pistyll with 170 mm (6.7 in).

Average sunshine

Many places experience limited sunshine during this period. Llandudno receives around 33 hours of sunlight. If you prefer more sunny conditions, our weather planner can help you explore other destinations.

Explore Gwynedd by month

Pick a month to see the average temperature, rainfall and sunshine in Gwynedd — and find the best time to visit. (based on Llandudno)

January9°C (48°F) February9°C (48°F) March10°C (50°F) April12°C (54°F) May15°C (59°F) June18°C (64°F) This monthJuly20°C (68°F) August19°C (66°F) September18°C (64°F) October15°C (59°F) November11°C (52°F) December9°C (48°F)
Best Time to Visit Gwynedd →

Best Places to Visit in Gwynedd in January

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

Conditions Temperatures Precipitation
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 Gwynedd

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

Temperature range in Gwynedd (January)

Precipitation variation in Gwynedd (January)

Llandudno

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

« December
January
February »
December
January
February
Max temperature
9°C (48°F)
9°C (48°F)
9°C (48°F)
Min temperature
4°C (39°F)
4°C (39°F)
4°C (39°F)
Monthly sun hours
26 hours
33 hours
57 hours
Monthly rainfall
111 mm (4.4 in)
92 mm (3.6 in)
89 mm (3.5 in)
Monthly rainy days
21 days
21 days
16 days
Weather conditions
poor
poor
poor
Climate in Llandudno →

Criccieth

In January Criccieth 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 poor that month.

« December
January
February »
December
January
February
Max temperature
9°C (48°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
26 hours
33 hours
57 hours
Monthly rainfall
181 mm (7.1 in)
157 mm (6.2 in)
142 mm (5.6 in)
Monthly rainy days
21 days
21 days
16 days
Weather conditions
poor
poor
poor
Climate in Criccieth →

Conwy

In January Conwy generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
9°C (48°F)
9°C (48°F)
9°C (48°F)
Min temperature
4°C (39°F)
3°C (37°F)
3°C (37°F)
Monthly sun hours
26 hours
33 hours
57 hours
Monthly rainfall
107 mm (4.2 in)
91 mm (3.6 in)
89 mm (3.5 in)
Monthly rainy days
21 days
21 days
16 days
Weather conditions
poor
poor
poor
Climate in Conwy →

Holyhead

In January Holyhead generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 6°C (43°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
11°C (52°F)
10°C (50°F)
10°C (50°F)
Min temperature
6°C (43°F)
6°C (43°F)
5°C (41°F)
Monthly rainfall
118 mm (4.6 in)
99 mm (3.9 in)
90 mm (3.5 in)
Monthly rainy days
20 days
21 days
16 days
Weather conditions
poor
poor
poor
Climate in Holyhead →

Bangor

In January Bangor generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
9°C (48°F)
9°C (48°F)
9°C (48°F)
Min temperature
4°C (39°F)
3°C (37°F)
3°C (37°F)
Monthly sun hours
26 hours
33 hours
57 hours
Monthly rainfall
117 mm (4.6 in)
102 mm (4 in)
99 mm (3.9 in)
Monthly rainy days
21 days
21 days
16 days
Weather conditions
poor
poor
poor
Climate in Bangor →

Is your destination not in the list? Have a look at all destinations in Gwynedd, 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 Gwynedd in January.

City Weather Day temp Night temp Rainfall
Llandudno 9°C (48°F) 4°C (39°F) 92 mm (3.6 in)
Criccieth 9°C (48°F) 4°C (39°F) 157 mm (6.2 in)
Conwy 9°C (48°F) 3°C (37°F) 91 mm (3.6 in)
Holyhead 10°C (50°F) 6°C (43°F) 99 mm (3.9 in)
Bangor 9°C (48°F) 3°C (37°F) 102 mm (4 in)
Beaumaris 9°C (48°F) 3°C (37°F) 97 mm (3.8 in)

Gwynedd weather in January: frequently asked questions

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

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

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

Daytime temperatures in Llandudno peak at roughly 9°C (48°F) in January, dropping to about 4°C (39°F) overnight.

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

Not particularly. Llandudno averages just 92 mm (3.6 in) of rain in January, making it a mostly dry month for Gwynedd, the United Kingdom.

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

Given the typically poor weather conditions in Llandudno, January may not be the ideal time to visit Gwynedd, the United Kingdom.

Generally speaking, the best visiting conditions can be found in July offering mostly perfect weather in Llandudno. In contrast, January, February, March, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Gwynedd.

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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