In December, Federal Way typically sees daytime highs of 8.0°C and overnight lows around 2.4°C. Compared to the annual average high of 15.5°C, December runs -7.5°C.
December in Federal Way averages a daytime high of 8.0°C and an overnight low of 2.4°C.
December runs -7.5°C compared to Federal Way's annual average high of 15.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 8.0°C and cooler evenings around 2.4°C.