The weather in St. John's, Canada, in December is about a few degrees below zero. . .

Judging from St. John's historical temperatures, from 2001 to 2011, the highest temperature throughout the year was 29 degrees and the lowest temperature was -20 degrees. Last year, the highest was 27 degrees and the lowest was -13 degrees.

For December: the average maximum temperature is 1.2 degrees, and the average minimum temperature is -5.5 degrees. The average temperature in December is -2.2 degrees.

The historical highest temperature in December is 16 degrees (12th, 1957) and the lowest temperature in December is -19.7 degrees (27th, 1984)