Taking into account the local weather in Bonanza is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 66°F, while the coldest months are December and January with an average of 34°F. The snowiest months in Bonanza are January, March, February, and April, with each month seeing an average of 8 inches of snowfall.