In December, Richland typically sees daytime highs of 4.9°C and overnight lows around -2.8°C. Compared to the annual average high of 18.7°C, December runs -13.7°C.
December in Richland averages a daytime high of 4.9°C and an overnight low of -2.8°C.
December runs -13.7°C compared to Richland's annual average high of 18.7°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.9°C and cooler evenings around -2.8°C.