The most pleasant months of the year for Grano are June, July and August. In Grano, there are 3 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Grano with an average high temperature of 81.6°, which ranks it as about average compared to other places in North Dakota. January is the snowiest month in Grano with 8.7 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.