December in Qazvin is the rainiest month of the year. In December, the weather in Qazvin is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Qazvin has 25 sunny, 4 partly cloudy, and 2 rainy days in December. The rains are usually moderate. December as well as January and February is considered the most uncomfortable time to visit Qazvin.