In December, Toronto typically sees daytime highs of 1.1°C and overnight lows around -5.1°C. Compared to the annual average high of 12.3°C, December runs -11.2°C.
December in Toronto averages a daytime high of 1.1°C and an overnight low of -5.1°C.
December runs -11.2°C compared to Toronto's annual average high of 12.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 1.1°C and cooler evenings around -5.1°C.