In May, Saint-Jean-sur-Richelieu typically sees daytime highs of 19.0°C and overnight lows around 6.9°C. Compared to the annual average high of 11.2°C, May runs +7.8°C.
May in Saint-Jean-sur-Richelieu averages a daytime high of 19.0°C and an overnight low of 6.9°C.
May runs +7.8°C compared to Saint-Jean-sur-Richelieu's annual average high of 11.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 19.0°C and cooler evenings around 6.9°C.