In December, Saint-Jean-sur-Richelieu typically sees daytime highs of -2.6°C and overnight lows around -10.9°C. Compared to the annual average high of 11.2°C, December runs -13.8°C.
December in Saint-Jean-sur-Richelieu averages a daytime high of -2.6°C and an overnight low of -10.9°C.
December runs -13.8°C compared to Saint-Jean-sur-Richelieu's annual average high of 11.2°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -2.6°C and cooler evenings around -10.9°C.