In May, Reykjavik typically sees daytime highs of 9.9°C and overnight lows around 3.5°C. Compared to the annual average high of 6.9°C, May runs +3.1°C.
May in Reykjavik averages a daytime high of 9.9°C and an overnight low of 3.5°C.
May runs +3.1°C compared to Reykjavik's annual average high of 6.9°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 9.9°C and cooler evenings around 3.5°C.