In May, Kotka typically sees daytime highs of 11.8°C and overnight lows around 3.6°C. Compared to the annual average high of 7.6°C, May runs +4.2°C.
May in Kotka averages a daytime high of 11.8°C and an overnight low of 3.6°C.
May runs +4.2°C compared to Kotka's annual average high of 7.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 11.8°C and cooler evenings around 3.6°C.