December in Halifax is the rainiest month of the year. In December, the weather in Halifax is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Halifax has 17 rainy, 10 cloudy, 3 sunny, and 1 partly cloudy day in December. The rains are usually heavy. December as well as March, April, May, and November is considered the most uncomfortable time to visit Halifax.