In April, Rio das Ostras typically sees daytime highs of 27.4°C and overnight lows around 20.7°C. Compared to the annual average high of 26.8°C, April runs +0.6°C.
April in Rio das Ostras averages a daytime high of 27.4°C and an overnight low of 20.7°C.
April runs +0.6°C compared to Rio das Ostras's annual average high of 26.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 27.4°C and cooler evenings around 20.7°C.