In May, Piedras Negras typically sees daytime highs of 32.8°C and overnight lows around 18.9°C. Compared to the annual average high of 28.6°C, May runs +4.2°C.
May in Piedras Negras averages a daytime high of 32.8°C and an overnight low of 18.9°C.
May runs +4.2°C compared to Piedras Negras's annual average high of 28.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 32.8°C and cooler evenings around 18.9°C.