In October, Castanhal typically sees daytime highs of 33.1°C and overnight lows around 21.8°C. Compared to the annual average high of 31.7°C, October runs +1.5°C.
October in Castanhal averages a daytime high of 33.1°C and an overnight low of 21.8°C.
October runs +1.5°C compared to Castanhal's annual average high of 31.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 33.1°C and cooler evenings around 21.8°C.