In May, St. Louis typically sees daytime highs of 24.9°C and overnight lows around 12.7°C. Compared to the annual average high of 19.0°C, May runs +5.9°C.
May in St. Louis averages a daytime high of 24.9°C and an overnight low of 12.7°C.
May runs +5.9°C compared to St. Louis's annual average high of 19.0°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 24.9°C and cooler evenings around 12.7°C.