In December, Knoxville typically sees daytime highs of 10.1°C and overnight lows around -0.8°C. Compared to the annual average high of 20.6°C, December runs -10.5°C.
December in Knoxville averages a daytime high of 10.1°C and an overnight low of -0.8°C.
December runs -10.5°C compared to Knoxville's annual average high of 20.6°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 10.1°C and cooler evenings around -0.8°C.