In December, Windsor typically sees daytime highs of 1.6°C and overnight lows around -5.5°C. Compared to the annual average high of 14.3°C, December runs -12.7°C.
December in Windsor averages a daytime high of 1.6°C and an overnight low of -5.5°C.
December runs -12.7°C compared to Windsor's annual average high of 14.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 1.6°C and cooler evenings around -5.5°C.