In May, St. John's typically sees daytime highs of 10.3°C and overnight lows around 2.0°C. Compared to the annual average high of 9.1°C, May runs +1.2°C.
May in St. John's averages a daytime high of 10.3°C and an overnight low of 2.0°C.
May runs +1.2°C compared to St. John's's annual average high of 9.1°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 10.3°C and cooler evenings around 2.0°C.