In May, Grand Island typically sees daytime highs of 23.3°C and overnight lows around 9.6°C. Compared to the annual average high of 17.2°C, May runs +6.1°C.
May in Grand Island averages a daytime high of 23.3°C and an overnight low of 9.6°C.
May runs +6.1°C compared to Grand Island's annual average high of 17.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.3°C and cooler evenings around 9.6°C.