March in Kostanai is the snowiest and the cloudiest month of the year. In March, the weather in Kostanai is typically freezing. Average daily high temperature in March is about 2 degrees below zero. On average, Kostanai has 19 cloudy, 7 snowy, 3 sunny, 1 rainy, and 1 partly cloudy day in March. The snowfalls are usually light.