In May, Ansan-si typically sees daytime highs of 21.4°C and overnight lows around 11.6°C. Compared to the annual average high of 15.9°C, May runs +5.5°C.
May in Ansan-si averages a daytime high of 21.4°C and an overnight low of 11.6°C.
May runs +5.5°C compared to Ansan-si's annual average high of 15.9°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 21.4°C and cooler evenings around 11.6°C.