Old Greenwich Weather in December

The climate in Old Greenwich during December can be summarized as cold and damp.

December is in the winter in Old Greenwich and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 5°C (41°F), whilst at night -5°C (23°F) is normal.

On average December is the 6th wettest month of the year in Old Greenwich with around 115mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 5 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 Old Greenwich in December 2024.