In December, Guelph typically sees daytime highs of -1.2°C and overnight lows around -8.3°C. Compared to the annual average high of 11.3°C, December runs -12.5°C.
December in Guelph averages a daytime high of -1.2°C and an overnight low of -8.3°C.
December runs -12.5°C compared to Guelph's annual average high of 11.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -1.2°C and cooler evenings around -8.3°C.