In December, Kennewick typically sees daytime highs of 4.8°C and overnight lows around -2.2°C. Compared to the annual average high of 17.9°C, December runs -13.1°C.
December in Kennewick averages a daytime high of 4.8°C and an overnight low of -2.2°C.
December runs -13.1°C compared to Kennewick's annual average high of 17.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.8°C and cooler evenings around -2.2°C.