The most pleasant months of the year for the 97331 zip code are September, July and August. In the 97331 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for the 97331 zip code with an average high temperature of 81.8°, which ranks it as cooler than most places in Oregon. February is the snowiest month in the 97331 zip code with 2.1 inches of snow, and 3 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.