In December, the weather in Petrovsk-Zabaykalskiy is typically freezing. Average daily high temperature in December is about 14 degrees below zero. On average, Petrovsk-Zabaykalskiy has 12 partly cloudy, 8 sunny, 7 cloudy, and 4 snowy days in December. The snowfalls are usually light. December as well as January and February is considered the most uncomfortable time to visit Petrovsk-Zabaykalskiy.