The most pleasant months of the year for Wahpeton are June, August and July. In Wahpeton, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Wahpeton with an average high temperature of 83.1°, which ranks it as warmer than most places in North Dakota. January is the snowiest month in Wahpeton with 8.4 inches of snow, and 7 months of the year have significant snowfall. July is the most humid month, though it is still relatively mild compared to many other places.