Wahpeton (zip 58075), North Dakota, gets 24 inches of rain per year. The US average is 39. Snowfall is 31 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 47. On average, there are 197 sunny days per year in Wahpeton (zip 58075), North Dakota. The July high is around 83 degrees. The January low is 0. Sperling's comfort index for Wahpeton (zip 58075) is a 30 out of 100, where a higher score indicates a more comfortable year-around climate.