In May, Castanhal typically sees daytime highs of 31.1°C and overnight lows around 22.2°C. Compared to the annual average high of 31.7°C, May runs -0.5°C.
May in Castanhal averages a daytime high of 31.1°C and an overnight low of 22.2°C.
May runs -0.5°C compared to Castanhal's annual average high of 31.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 31.1°C and cooler evenings around 22.2°C.