Best time to go

Cardiff in December 2026: weather, temperatures and activities

Do you want to visit Cardiff in December 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether December is a good month to travel to Cardiff, Wales.

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Is it worth visiting Cardiff in December?

Check your ideal travel criteria and see if the month of December suits your plans to go to Cardiff.
What matters most?
Cardiff in December 2026: weather, temperatures and activities

Page summary

Cardiff in December in summary
Adverse weather
Min 6°C Max 9°C 75 mm 6 day(s) 89% 58% 13°C 5.5 h/day 1.8 cm
Best activities in December
Cultural visits and heritageGastronomy
Practical guidelines
High crowding High prices 08:12 16:04
Hourly weather

Average weather in Cardiff in December 2026

Adverse weather

The weather in Cardiff in December 2026 is based on statistical data from previous years in December. This allows you to forecast the weather in December 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

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Climate

Climate of Cardiff in December

Temperatures, precipitation, snow and monthly trends help better understand the climate in Cardiff in December.

Temperatures and rain in Cardiff in December

Average daily weather

Temperatures, rain and snow day by day in December, with a separate scale for snow.
Minimal Average Maximums Average rainfall Daily snow

Monthly temperatures

The month of December is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Cardiff in December

Seasonal normals

Seasonal normals of Cardiff in December

Check the seasonal normals in Cardiff in December and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
December
Weather data November December January
Outside temperature
Average temperature 9.4°C 7.5°C 6.2°C
Maximum temperature 10.9°C 8.9°C 7.8°C
Minimum temperature 7.8°C 6.1°C 4.6°C
Record maximum temperature 17.0°C
(2020)
14.0°C
(2015)
13.0°C
(2015)
Record low temperature -5.0°C
(2010)
-7.0°C
(2010)
-5.0°C
(2010)
Number of days at +30° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days at +18° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days below 0° 1 day(s)
(3%)
2 day(s)
(6%)
4 day(s)
(13%)
Sea temperature
Sea temperature (average) 13.6°C 11.5°C 9.1°C
Sea temperature (minimum) 12.5°C 10.2°C 7.7°C
Sea temperature (maximum) 14.9°C 12.9°C 11.0°C
Wind
Wind speed 25 km/h 26 km/h 26 km/h
Wind temperature 5.0°C 2.6°C 0.8°C
Precipitation (rain)
Precipitation 74.4 mm 75.2 mm 67.0 mm
Number of days with precipitation 17 day(s)
(57%)
18 day(s)
(58%)
17 day(s)
(55%)
Number of days with significant precipitation (greater than 5 mm) 5 day(s)
(18%)
6 day(s)
(18%)
4 day(s)
(14%)
Record precipitation in one day 27.9 mm
(2016)
29.5 mm
(2012)
23.5 mm
(2012)
Other weather data
Humidity 88% 89% 89%
Visibility 9.1 km 9.1 km 9.0 km
Cloud cover 59% 58% 58%
UV index 3 2 2
Daily sunshine 6h 6h 6h
Sunrise and sunset
Sunrise time 07h31 08h12 08h11
Sunset time 16h23 16h04 16h33
Day length 8h52 7h52 8h22
Our opinion on the climate in December
The review of Where And When adverse weather adverse weather very bad weather
Activities and events

What to do in Cardiff in December?

Best activities in December
Cultural visits and heritageGastronomy
Possible activities in December
Family and attractionsNightlife
Activities not recommended in December
Beach and swimmingNature and landscapesBoat trip and cruise
Prices monitored continuously

The best offers right now to Cardiff

Each map is a real return flight offered from London, with its dates, airline and price. Choose one to find it on Skyscanner, or start your own search just below.

The cheapest

London Cardiff

From 4 Dec to 8 Dec 2026

£118 per person
4 days on site With stopover(s) Ryanair
The cheapest

London Cardiff

From 10 Dec to 17 Dec 2026

£133 per person
7 days on site With stopover(s) Ryanair
The cheapest

London Cardiff

From 16 Dec to 22 Dec 2026

£153 per person
6 days on site With stopover(s) Ryanair
The cheapest

London Cardiff

From 20 Dec to 29 Dec 2026

£166 per person
9 days on site With stopover(s) Ryanair
The cheapest

London Cardiff

From 9 Dec to 14 Dec 2026

£166 per person
5 days on site With stopover(s) EasyJet
The cheapest

London Cardiff

From 15 Dec to 22 Dec 2026

£168 per person
7 days on site With stopover(s) Ryanair
The cheapest

London Cardiff

From 14 Dec to 22 Dec 2026

£182 per person
8 days on site With stopover(s) EasyJet
The cheapest

London Cardiff

From 25 Dec to 29 Dec 2026

£183 per person
4 days on site With stopover(s) Wizz Air Uk
The cheapest

London Cardiff

From 7 Dec to 13 Dec 2026

£204 per person
6 days on site With stopover(s) EasyJet
Searching for the best deals…

Round-trip prices per person, recently collected from Skyscanner. Each offer has its own collection date and fares change constantly: the price displayed on Skyscanner is authoritative.

Observed weather

What was the weather like in Cardiff in December last?

Find the observed weather calendar in Cardiff in December 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Light drizzle
11°C12°C6.4 mm
2
Patchy rain nearby
7°C9°C1.8 mm
3
Clear/Sunny
6°C9°C0.7 mm
4
Patchy rain nearby
6°C9°C1.8 mm
5
Light rain
7°C11°C13.1 mm
6
Light rain shower
10°C11°C4.6 mm
7
Light drizzle
10°C13°C2.8 mm
8
Patchy rain nearby
10°C11°C0.2 mm
9
Light drizzle
10°C13°C5.0 mm
10
Partly Cloudy
9°C11°C0.0 mm
11
Patchy rain nearby
7°C11°C0.2 mm
12
Partly Cloudy
7°C10°C1.1 mm
13
Clear/Sunny
6°C9°C0.0 mm
14
Partly Cloudy
9°C11°C0.0 mm
15
Light rain
10°C11°C17.8 mm
16
Overcast
7°C10°C0.8 mm
17
Light drizzle
4°C10°C5.2 mm
18
Moderate rain
9°C12°C7.2 mm
19
Patchy rain nearby
8°C9°C0.0 mm
20
Patchy rain nearby
7°C9°C1.3 mm
21
Light rain shower
6°C9°C1.6 mm
22
Partly Cloudy
9°C10°C1.0 mm
23
Partly Cloudy
7°C9°C0.2 mm
24
Clear/Sunny
4°C6°C0.0 mm
25
Clear/Sunny
3°C4°C0.0 mm
26
Clear/Sunny
2°C5°C0.0 mm
27
Clear/Sunny
3°C7°C0.0 mm
28
Clear/Sunny
4°C7°C0.0 mm
29
Overcast
4°C6°C0.0 mm
30
Partly Cloudy
5°C6°C0.0 mm
31
Clear/Sunny
1°C4°C0.0 mm
Nearby

Where to go near Cardiff in December?

Compare cities and destinations near Cardiff in December to find another travel stop, a nearby alternative or a logical continuation of your stay in Cardiff.

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Every month

Best time to visit Cardiff month by month

Compare the weather in Cardiff across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Cardiff in December: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

Not really. The weather conditions are unfavorable in Cardiff in December, which places this month 9th out of 12. A trip is still possible, but plan a flexible itinerary.

Expect an average of 9°C during the day and 6°C at night, with about 75 mm of precipitation spread over 6 rainy days.

The sea is only 12°C on average in December. Swimming is still possible, but it will be cool.

Expect about 5.5 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Cultural visits and heritage and Gastronomy. These are the ones for which the conditions on site are most favourable.

Visitor numbers are moderate: this month is in High crowding, with an index of 68/100. It is often a good compromise between weather and tranquility.

Prices are average: level High prices, with an index of 61/100, including flights and accommodation.

If your dates are flexible, the most favorable months in Cardiff are: June, July, August and September. Compare them before finalizing your departure.
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