In December, Rio Branco typically sees daytime highs of 30.7°C and overnight lows around 21.8°C. Compared to the annual average high of 31.2°C, December runs -0.5°C.
December in Rio Branco averages a daytime high of 30.7°C and an overnight low of 21.8°C.
December runs -0.5°C compared to Rio Branco's annual average high of 31.2°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 30.7°C and cooler evenings around 21.8°C.