Though weather is just one factor, it can really affect your travel plans, especially when you're planning an extended stay in Owyhee. The hottest months are usually July and August with an average temp of 65°F, while the coldest months are December and January with an average of 24°F. The snowiest months in Owyhee are March, January, December, and February, with each month seeing an average of 9 inches of snowfall.