In December, Porto Alegre typically sees daytime highs of 28.8°C and overnight lows around 18.4°C. Compared to the annual average high of 24.3°C, December runs +4.5°C.
December in Porto Alegre averages a daytime high of 28.8°C and an overnight low of 18.4°C.
December runs +4.5°C compared to Porto Alegre's annual average high of 24.3°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 28.8°C and cooler evenings around 18.4°C.