The most pleasant months of the year for Knoxville are October, April and May. In Knoxville, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Knoxville with an average high temperature of 91.4°, which ranks it as warmer than most places in Georgia. January is the snowiest month in Knoxville with 0.2 inches of snow, and no months of the year have significant snowfall. The most uncomfortably humid months are July, August and June.