In September, Viana typically sees daytime highs of 27.0°C and overnight lows around 19.1°C. Compared to the annual average high of 28.6°C, September runs -1.5°C.
September in Viana averages a daytime high of 27.0°C and an overnight low of 19.1°C.
September runs -1.5°C compared to Viana's annual average high of 28.6°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 27.0°C and cooler evenings around 19.1°C.