In December, Lethbridge typically sees daytime highs of 0.3°C and overnight lows around -10.8°C. Compared to the annual average high of 11.9°C, December runs -11.6°C.
December in Lethbridge averages a daytime high of 0.3°C and an overnight low of -10.8°C.
December runs -11.6°C compared to Lethbridge's annual average high of 11.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 0.3°C and cooler evenings around -10.8°C.