The climate in Swansea during December can be summarized as cool and wet.
December is in the winter in Swansea and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 9°C (47°F), whilst at night 4°C (39°F) is normal.
|Daytime temperature||8.6°C 47.4°F|
|Nightly temperature||3.9°C 38.9°F|
|Average temperature||6.2°C 43.2°F|
|Daily sunshine||1.8 hrs|
|Avg rainfall||140 mm 5.5 ins|
|Rainy days||20 days|
|Sea temperature||11.6°C 52.9°F|
|Windspeed||21.6kph 14 mph|
On average December is the wettest month of the year in Swansea with around 140mm 5.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.8 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Swansea in December 2022.
|Hottest month:||July||19.5°C 67.1°F|
|Driest month:||April||69mm 2.7ins|
|Coldest month:||February||7.2°C 45°F|
|Wettest month:||December||140mm 5.5ins|