Castrillón Weather in December

The climate in Castrillón during December can be summarized as cool and damp.

December is in the winter in Castrillón and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 11°C (51°F), whilst at night 4°C (39°F) is normal.

On average December is the wettest month of the year in Castrillón with around 113mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.9 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 Castrillón in December 2024.