December in Bonners Ferry is the snowiest, the cloudiest, and the most freezing month of the year. In December, the weather in Bonners Ferry is typically freezing. Average daily high temperature in December is about 1 degree below zero. On average, Bonners Ferry has 13 cloudy, 8 snowy, 7 partly cloudy, 2 rainy, and 1 sunny day in December. The snowfalls are usually heavy.