Saint John Weather in December

The climate in Saint John during December can be summarized as cold and dry.

December is in the winter in Saint John and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cold 7°C (44°F), whilst at night -7°C (20°F) is normal.

On average December is the 3rd driest month of the year in Saint John with around 20mm 0.8 inches of rain making it a dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.4 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 John in December 2024.