In May, Saint-Louis typically sees daytime highs of 31.0°C and overnight lows around 19.4°C. Compared to the annual average high of 31.4°C, May runs -0.4°C.
May in Saint-Louis averages a daytime high of 31.0°C and an overnight low of 19.4°C.
May runs -0.4°C compared to Saint-Louis's annual average high of 31.4°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 31.0°C and cooler evenings around 19.4°C.