December in Vancouver is the coldest month of the year. In December, the weather in Vancouver is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Vancouver has 17 rainy, 6 partly cloudy, 4 sunny, and 4 cloudy 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 Vancouver.