In December, Greeley typically sees daytime highs of 6.6°C and overnight lows around -8.9°C. Compared to the annual average high of 18.5°C, December runs -12.0°C.
December in Greeley averages a daytime high of 6.6°C and an overnight low of -8.9°C.
December runs -12.0°C compared to Greeley's annual average high of 18.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 6.6°C and cooler evenings around -8.9°C.