In May, Brussels typically sees daytime highs of 17.7°C and overnight lows around 7.7°C. Compared to the annual average high of 13.8°C, May runs +3.9°C.
May in Brussels averages a daytime high of 17.7°C and an overnight low of 7.7°C.
May runs +3.9°C compared to Brussels's annual average high of 13.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 17.7°C and cooler evenings around 7.7°C.