In May, Bolton typically sees daytime highs of 14.4°C and overnight lows around 6.5°C. Compared to the annual average high of 11.6°C, May runs +2.8°C.
May in Bolton averages a daytime high of 14.4°C and an overnight low of 6.5°C.
May runs +2.8°C compared to Bolton's annual average high of 11.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 14.4°C and cooler evenings around 6.5°C.