In December, Hamilton typically sees daytime highs of 5.5°C and overnight lows around -3.9°C. Compared to the annual average high of 17.6°C, December runs -12.1°C.
December in Hamilton averages a daytime high of 5.5°C and an overnight low of -3.9°C.
December runs -12.1°C compared to Hamilton's annual average high of 17.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 5.5°C and cooler evenings around -3.9°C.