In December, Renton typically sees daytime highs of 7.6°C and overnight lows around 1.9°C. Compared to the annual average high of 15.2°C, December runs -7.7°C.
December in Renton averages a daytime high of 7.6°C and an overnight low of 1.9°C.
December runs -7.7°C compared to Renton's annual average high of 15.2°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 7.6°C and cooler evenings around 1.9°C.