In May, Lancaster typically sees daytime highs of 22.6°C and overnight lows around 9.8°C. Compared to the annual average high of 16.8°C, May runs +5.8°C.
May in Lancaster averages a daytime high of 22.6°C and an overnight low of 9.8°C.
May runs +5.8°C compared to Lancaster's annual average high of 16.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 22.6°C and cooler evenings around 9.8°C.