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Кардифф in January: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Кардифф in January will be like? Take a look at our weather guide for Кардифф, based on historical data.
Check flight prices to Кардифф on Avionero:
January

Weather in Кардифф in January 2026

Uncomfortable Weather
Cool
🌧️
Rainy
🌊
Cold water
If you are thinking of traveling to Кардифф in January, think and plan carefully. The average daytime high temperature is usually around +8°C, and there are only about 2 sunny days in total throughout the whole month. Pack for extremes to ensure that you are as comfortable as possible. Search flights in one click on Avionero.
Good to know:
  • January is usually the coldest month of the year in Кардифф;

Average weather

☀️
+8°C
Avg. max. temperature
-9°C
Min.
+14°C
Max.
91 mm
Total precipitation
85%
Avg. humidity
5 m/s
Avg. wind
2 ☀️
Sunny Days
9 ⛅️
Cloudy
18 🌦
Rainy
Our opinion: Кардифф has uncomfortable weather in January.

Average temperature in Кардифф in January

Here are the expected maximum, average and minimum temperatures in Кардифф for January based on the historical data.
Last Year
Historical Data

Going from a maximum of +13°C during the day to a minimum of -2°C during the night, the temperature in January averages around +9°C.

The average maximum temperature goes down 7% by the end of the month, compared with the beginning of the month, from +11°C to +10°C.

Is Кардифф warm or cold in January?

Кардифф is typically cool in January.

Maximum temperatures go down compared to the previous month from +9°C to +8°C. The minimum temperature also goes down from +5°C to +4°C.

Pack a sweater and a jacket as there will be cooler temperatures.

January is the coldest month in Кардифф, here is the comparison with other months:

Water temperature in Кардифф in January

Water in Кардифф in January is Cold. It varies from +7°C to +10°C, with an average of +9°C. Note that the air temperature is lower than the water temperature, averaging around +8°C.

The water temperature in January is one of the coldest of the entire year:

The warmest water temperatures in Кардифф are reached in August, when the average sea temperature rises to +17°C. The coldest water temperatures are in March, with an average of +8°C.

Can you swim in Кардифф in January?

We would not recommend swimming in Кардифф in January, the water is very cold (+9°C on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +16°C
🏄‍♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.

Climate in Кардифф in January

Кардифф weather looks like this, on average, in January and the surrounding months.
DecemberJanuaryFebruary
Avg. temperature
+9°C+8°C+8°C
Min. temperature
-7°C-9°C-8°C
Max. temperature
+16°C+14°C+17°C
Rainfall
108 mm91 mm76 mm
Wind
5 m/s5 m/s5 m/s
Avg. water temperature
+11°C+9°C+9°C
Humidity
85%85%82%
Air pressure
1013 HPa1014 HPa1015 HPa
Sunny days
222
Cloudy days
9910
Rainy days
181815
Snowy days
122

January typically has worse weather conditions compared to December. It’s getting colder in January. From +9°C in the day, the average maximum temperature lowers to +8°C. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 108 mm to 91 mm. Humidity levels don’t change as the month goes on, averaging around 85%. The average wind speed doesn’t change much during January, staying around 5 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.

But maybe it is worth considering traveling in February as the weather gets better.

Wind

Wind speed in Кардифф in January based on historical data.
Last Year
Historical Data

The average wind speed is 5 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Кардифф is gradually increasing during January, going from 6 m/s to 6 m/s over the course of the month.

Rain

Amount of rainfall in mm during January in Кардифф based on historical data.
Last Year
Historical Data
Typically, there is a 87% chance of rain on an average day in January, with total rainfall of approximately 191 mm. The maximum amount of rainfall per day is around 26 mm, which is moderate rain. January is a pretty wet month with over 27 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how January is compared with other months in the amount of precipitation, total mm:
Кардифф wettest month is October, where a typical day has a 65% chance of precipitation and 121 mm of rainfall per day. April, on the other hand, is the driest month with a mere 50% chance of precipitation and 65 mm of rainfall per day.

Snow

Amount of snow in mm during January in Кардифф based on historical data.
Last Year
Historical Data
Typically, there is a 0% chance of snow on an average day in January, with a total monthly snowfall of approximately 11 mm.

January is one of the snowiest months in Кардифф.

Here’s how January is compared with other months in the amount of snow, total mm:

How was the weather last January in Кардифф?

This is the weather in Кардифф in January 2024:
1 January
🌧️
+11°C
2 January
🌧️
+8°C
3 January
🌧️
+12°C
4 January
🌧️
+12°C
5 January
🌧️
+12°C
6 January
🌧️
+12°C
7 January
🌧️
+12°C
8 January
🌧️
+8°C
9 January
🌧️
+8°C
10 January
🌧️
+13°C
11 January
🌧️
+10°C
12 January
🌧️
+11°C
13 January
🌧️
+10°C
14 January
🌧️
+12°C
15 January
🌧️
+8°C
16 January
☀️
+5°C
17 January
☀️
+5°C
18 January
☀️
+5°C
19 January
☀️
+6°C
20 January
☀️
+7°C
21 January
☀️
+3°C
22 January
☀️
+5°C
23 January
☀️
+6°C
24 January
☀️
+5°C
25 January
🌫️
+8°C
26 January
☁️
+8°C
27 January
☁️
+6°C
28 January
☁️
+6°C
29 January
☁️
+9°C
30 January
☀️
+9°C
31 January
☁️
+10°C
In January 2024 Кардифф had 10 sunny days, 5 cloudy days, and 15 rainy days. The average maximum temperature was +9°C, with an absolute maximum of +13°C and a minimum of +3°C. The average humidity was 86%, with a maximum of 100% and a minimum of 45%. The average wind speed was 5 m/s, with a maximum of 17 m/s and a minimum of 0 m/s.
Are you planning a trip in January?

Climate Change over Years

This is how Кардифф climate have been changing during last 43 years period.

The climate in Кардифф in January has not changed much over the last 43 years.

The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 2010 with only 736 mm of rainfall, and the wettest year was 2024 with 2057 mm.

FAQ

Frequently asked questions about the weather in Кардифф in January:

Is January a good time to visit Кардифф?

There is never a bad time to go to Кардифф, but the weather isn’t the best in January, so plan on enjoying the great indoor attractions of Кардифф and pack for the extremes in weather.

Can you sunbathe in Кардифф in January?

Not really, January is not the best time to sunbathe, unless you visit a local solarium.

Can you swim in Кардифф in January?

Swimming in Кардифф in January is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.

Is Кардифф rainy in January?

Кардифф is often rainy in January. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Кардифф in January?

Usually, it’s not very sunny in Кардифф in January, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in United Kingdom

Check out the weather for other cities in United Kingdom.

Monthly weather in Кардифф

Source of the data

For this page, we’ve looked at the typical weather in Кардифф, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.