Saint Helens Weather in December

The climate in Saint Helens during December can be summarized as cool and very wet.

December is in the winter in Saint Helens and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cold 7°C (45°F), whilst at night 1°C (33°F) is normal.

On average December is the wettest month of the year in Saint Helens with around 202mm 8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.3 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 Saint Helens in December 2024.