December in Kirkland is the coldest month of the year. In December, the weather in Kirkland is typically cold. Average daily high temperature in December is about 5 degrees above zero. On average, Kirkland has 16 rainy, 5 sunny, 5 cloudy, and 5 partly 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 Kirkland.