The most pleasant months of the year for Cottonwood Lake are June, August and July. In Cottonwood Lake, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Cottonwood Lake with an average high temperature of 82.1°, which ranks it as about average compared to other places in North Dakota. January is the snowiest month in Cottonwood Lake with 8.8 inches of snow, and 8 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.