In December, Calgary typically sees daytime highs of -2.1°C and overnight lows around -13.6°C. Compared to the annual average high of 9.5°C, December runs -11.6°C.
December in Calgary averages a daytime high of -2.1°C and an overnight low of -13.6°C.
December runs -11.6°C compared to Calgary's annual average high of 9.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near -2.1°C and cooler evenings around -13.6°C.