In May, Koriyama typically sees daytime highs of 21.5°C and overnight lows around 10.7°C. Compared to the annual average high of 17.1°C, May runs +4.4°C.
May in Koriyama averages a daytime high of 21.5°C and an overnight low of 10.7°C.
May runs +4.4°C compared to Koriyama's annual average high of 17.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 21.5°C and cooler evenings around 10.7°C.