In May, Vientiane typically sees daytime highs of 33.5°C and overnight lows around 24.1°C. Compared to the annual average high of 31.3°C, May runs +2.1°C.
May in Vientiane averages a daytime high of 33.5°C and an overnight low of 24.1°C.
May runs +2.1°C compared to Vientiane's annual average high of 31.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 33.5°C and cooler evenings around 24.1°C.