In May, Dartmouth typically sees daytime highs of 13.5°C and overnight lows around 4.1°C. Compared to the annual average high of 10.5°C, May runs +2.9°C.
May in Dartmouth averages a daytime high of 13.5°C and an overnight low of 4.1°C.
May runs +2.9°C compared to Dartmouth's annual average high of 10.5°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 13.5°C and cooler evenings around 4.1°C.