The most pleasant months of the year for Spring Grove are September, May and June. In Spring Grove, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Spring Grove with an average high temperature of 89.7°, which ranks it as one of the hottest places in Nebraska. February is the snowiest month in Spring Grove with 5.8 inches of snow, and 7 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.