In August, Saint-Jean-sur-Richelieu typically sees daytime highs of 24.9°C and overnight lows around 13.8°C. Compared to the annual average high of 11.2°C, August runs +13.7°C.
August in Saint-Jean-sur-Richelieu averages a daytime high of 24.9°C and an overnight low of 13.8°C.
August runs +13.7°C compared to Saint-Jean-sur-Richelieu's annual average high of 11.2°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 24.9°C and cooler evenings around 13.8°C.