In May, St Helens typically sees daytime highs of 15.4°C and overnight lows around 6.8°C. Compared to the annual average high of 12.6°C, May runs +2.8°C.
May in St Helens averages a daytime high of 15.4°C and an overnight low of 6.8°C.
May runs +2.8°C compared to St Helens's annual average high of 12.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 15.4°C and cooler evenings around 6.8°C.