In May, Nagaoka typically sees daytime highs of 22.6°C and overnight lows around 10.8°C. Compared to the annual average high of 17.7°C, May runs +4.9°C.
May in Nagaoka averages a daytime high of 22.6°C and an overnight low of 10.8°C.
May runs +4.9°C compared to Nagaoka's annual average high of 17.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 22.6°C and cooler evenings around 10.8°C.