In May, Niteroi typically sees daytime highs of 26.4°C and overnight lows around 18.1°C. Compared to the annual average high of 27.8°C, May runs -1.4°C.
May in Niteroi averages a daytime high of 26.4°C and an overnight low of 18.1°C.
May runs -1.4°C compared to Niteroi's annual average high of 27.8°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 26.4°C and cooler evenings around 18.1°C.