In May, Knoxville typically sees daytime highs of 25.5°C and overnight lows around 12.4°C. Compared to the annual average high of 20.6°C, May runs +5.0°C.
May in Knoxville averages a daytime high of 25.5°C and an overnight low of 12.4°C.
May runs +5.0°C compared to Knoxville's annual average high of 20.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 25.5°C and cooler evenings around 12.4°C.