Weather is only one factor, but it can really affect your travel plans, especially if you're planning an extended stay in Tygh Valley. The hottest months are usually August and July with an average temp of 57°F, while the coldest months are December and February with an average of 29°F. The snowiest months in Tygh Valley are January, February, November, and December, with each month seeing an average of 7 inches of snowfall.