In December, Viana typically sees daytime highs of 29.8°C and overnight lows around 22.2°C. Compared to the annual average high of 28.6°C, December runs +1.3°C.
December in Viana averages a daytime high of 29.8°C and an overnight low of 22.2°C.
December runs +1.3°C compared to Viana's annual average high of 28.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 29.8°C and cooler evenings around 22.2°C.