In December, Olympia typically sees daytime highs of 7.6°C and overnight lows around 1.3°C. Compared to the annual average high of 15.7°C, December runs -8.0°C.
December in Olympia averages a daytime high of 7.6°C and an overnight low of 1.3°C.
December runs -8.0°C compared to Olympia's annual average high of 15.7°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 7.6°C and cooler evenings around 1.3°C.