Cardiff Weather in December

December in Cardiff typically sees daytime highs of 10°C (50°F) and nighttime lows of 5°C (41°F). As the wettest month of the year, expect more rainfall than other months. It falls within the winter season.

Rainfall in Cardiff in December

Since this month has the highest rainfall, keep an umbrella with you to handle sudden showers. The climate data from previous years indicates about 19 days of rain, averaging 119 mm (4.7 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Cardiff in December

Daytime temperatures in Cardiff reach 10°C (50°F) in December, dropping to 5°C (41°F) at night. Experience the winter season in December. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Cardiff in December

With limited sunshine this month, there are about 49 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.

Wind Speed in Cardiff in December

Average wind conditions reach 5 m/s (10 knots) in December. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in December

At 10°C (50°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Cardiff.