Planning for the weather is an important factor for making your trip to Bonners Ferry a success, especially when you’re splurging. The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and February with an average of 26°F. The snowiest months in Bonners Ferry are January, February, December, and March, with each month seeing an average of 13 inches of snowfall.