In May, Calais typically sees daytime highs of 15.0°C and overnight lows around 8.6°C. Compared to the annual average high of 12.7°C, May runs +2.2°C.
May in Calais averages a daytime high of 15.0°C and an overnight low of 8.6°C.
May runs +2.2°C compared to Calais's annual average high of 12.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 15.0°C and cooler evenings around 8.6°C.