In May, New Haven typically sees daytime highs of 20.2°C and overnight lows around 8.5°C. Compared to the annual average high of 15.4°C, May runs +4.8°C.
May in New Haven averages a daytime high of 20.2°C and an overnight low of 8.5°C.
May runs +4.8°C compared to New Haven's annual average high of 15.4°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 20.2°C and cooler evenings around 8.5°C.