In May, Mong Cai typically sees daytime highs of 29.9°C and overnight lows around 23.0°C. Compared to the annual average high of 25.8°C, May runs +4.2°C.
May in Mong Cai averages a daytime high of 29.9°C and an overnight low of 23.0°C.
May runs +4.2°C compared to Mong Cai's annual average high of 25.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 29.9°C and cooler evenings around 23.0°C.