Daytime highs, nighttime lows and the warmest cities in Wales, the United Kingdom this December.
Wales, the United Kingdom, a region in the United Kingdom, typically experiences cold weather in December, with maximum daytime temperatures around 10°C (50°F) and nighttime temperatures around 5°C (41°F) in Cardiff. In December, it is winter.
Explore the map below to discover average December temperatures at the top destinations in Wales. For a deeper dive, simply click on any destination dot.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Wales.
Marker color shows the average daytime high temperature in December: blue is cold, red is hot.
Expect daytime temperatures around 10°C (50°F) in Cardiff. That makes December a low month for Wales, the United Kingdom.
After dark, Cardiff cools to about 5°C (41°F) on an average December night.
Most areas see fewer sunny days, with a projection of about 49 hours of sunshine in Cardiff. This reduced sunlight makes it ideal for those who prefer cooler, overcast conditions over bright sunny days.
The water temperature averages approximately 10°C (50°F) in Cardiff this month, generally too cold for comfortable swimming.
We have much more information about the climate in Wales.
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