In May, St. Petersburg typically sees daytime highs of 29.1°C and overnight lows around 20.4°C. Compared to the annual average high of 26.6°C, May runs +2.5°C.
May in St. Petersburg averages a daytime high of 29.1°C and an overnight low of 20.4°C.
May runs +2.5°C compared to St. Petersburg's annual average high of 26.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 29.1°C and cooler evenings around 20.4°C.