Taking into account the local weather in Cottonwood is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and July with an average temp of 61°F, while the coldest months are December and January with an average of 28°F. The snowiest months in Cottonwood are February, January, October, and December, with each month seeing an average of 5 inches of snowfall.