The most pleasant months of the year for Excelsior are June, August and September. In Excelsior, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Excelsior with an average high temperature of 83.7°, which ranks it as warmer than most places in North Dakota. December is the snowiest month in Excelsior with 7.1 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.