In December, Ajax typically sees daytime highs of 0.2°C and overnight lows around -7.0°C. Compared to the annual average high of 11.7°C, December runs -11.5°C.
December in Ajax averages a daytime high of 0.2°C and an overnight low of -7.0°C.
December runs -11.5°C compared to Ajax's annual average high of 11.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 0.2°C and cooler evenings around -7.0°C.