In December, Dartmouth typically sees daytime highs of 1.9°C and overnight lows around -5.5°C. Compared to the annual average high of 10.5°C, December runs -8.6°C.
December in Dartmouth averages a daytime high of 1.9°C and an overnight low of -5.5°C.
December runs -8.6°C compared to Dartmouth's annual average high of 10.5°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 1.9°C and cooler evenings around -5.5°C.