In December, Grand Junction typically sees daytime highs of 4.7°C and overnight lows around -7.0°C. Compared to the annual average high of 18.9°C, December runs -14.2°C.
December in Grand Junction averages a daytime high of 4.7°C and an overnight low of -7.0°C.
December runs -14.2°C compared to Grand Junction's annual average high of 18.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.7°C and cooler evenings around -7.0°C.