In December, Pematangsiantar typically sees daytime highs of 29.6°C and overnight lows around 19.6°C. Compared to the annual average high of 30.4°C, December runs -0.8°C.
December in Pematangsiantar averages a daytime high of 29.6°C and an overnight low of 19.6°C.
December runs -0.8°C compared to Pematangsiantar's annual average high of 30.4°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 29.6°C and cooler evenings around 19.6°C.