Weather will likely play an important role when you plan your trip to Kamiah, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July with an average temp of 67°F, while the coldest months are December and January with an average of 33°F. The snowiest months in Kamiah are January, December, April, and March, with each month seeing an average of 5 inches of snowfall.