In December, Spokane Valley typically sees daytime highs of 1.4°C and overnight lows around -3.7°C. Compared to the annual average high of 13.8°C, December runs -12.5°C.
December in Spokane Valley averages a daytime high of 1.4°C and an overnight low of -3.7°C.
December runs -12.5°C compared to Spokane Valley's annual average high of 13.8°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 1.4°C and cooler evenings around -3.7°C.