Sullivan Weather in December

The climate in Sullivan during December can be summarized as cool and a little damp.

December is in the winter in Sullivan and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 5°C (41°F), whilst at night -4°C (24°F) is normal.

On average December is the 5th driest month of the year in Sullivan with around 83mm 3.3 inches of rain making it a a little 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 4.2 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 Sullivan in December 2024.