The most pleasant months of the year for Zortman are June, September and August. In Zortman, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Zortman with an average high temperature of 84.6°, which ranks it as about average compared to other places in Montana. January is the snowiest month in Zortman with 6.8 inches of snow, and 8 months of the year have significant snowfall. Days with noticeable humidity are rare throughout the year.