In May, Saint-Hyacinthe typically sees daytime highs of 18.7°C and overnight lows around 6.5°C. Compared to the annual average high of 10.8°C, May runs +7.9°C.
May in Saint-Hyacinthe averages a daytime high of 18.7°C and an overnight low of 6.5°C.
May runs +7.9°C compared to Saint-Hyacinthe's annual average high of 10.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.7°C and cooler evenings around 6.5°C.