March in Mordovsky Bely Klyuch is the cloudiest month of the year. In March, the weather in Mordovsky Bely Klyuch is typically freezing. Average daily high temperature in March is about 1 degree below zero. On average, Mordovsky Bely Klyuch has 15 cloudy, 13 snowy, and 3 rainy days in March. The snowfalls are usually moderate.