December in Halifax is the windiest month of the year. In December, the weather in Halifax is typically cold. Average daily high temperature in December is about 5 degrees above zero. On average, Halifax has 16 rainy, 8 cloudy, 4 partly cloudy, and 3 sunny days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Halifax.