In May, Nampa typically sees daytime highs of 23.0°C and overnight lows around 6.7°C. Compared to the annual average high of 18.2°C, May runs +4.9°C.
May in Nampa averages a daytime high of 23.0°C and an overnight low of 6.7°C.
May runs +4.9°C compared to Nampa's annual average high of 18.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.0°C and cooler evenings around 6.7°C.