You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. 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.