December in Parnu is the windiest month of the year. In December, the weather in Parnu is typically freezing. Average daily high temperature in December is about zero. On average, Parnu has 16 snowy, 12 rainy, 2 cloudy, and 1 sunny day in December. The snowfalls are usually moderate. December as well as March, October, and November is considered the most uncomfortable time to visit Parnu.