In May, Omihachiman typically sees daytime highs of 22.3°C and overnight lows around 12.4°C. Compared to the annual average high of 18.7°C, May runs +3.6°C.
May in Omihachiman averages a daytime high of 22.3°C and an overnight low of 12.4°C.
May runs +3.6°C compared to Omihachiman's annual average high of 18.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 22.3°C and cooler evenings around 12.4°C.