In May, Saint Joseph typically sees daytime highs of 23.9°C and overnight lows around 11.3°C. Compared to the annual average high of 17.6°C, May runs +6.3°C.
May in Saint Joseph averages a daytime high of 23.9°C and an overnight low of 11.3°C.
May runs +6.3°C compared to Saint Joseph's annual average high of 17.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.9°C and cooler evenings around 11.3°C.