In December, Island Harbour typically sees daytime highs of 27.7°C and overnight lows around 23.4°C. Compared to the annual average high of 28.9°C, December runs -1.2°C.
December in Island Harbour averages a daytime high of 27.7°C and an overnight low of 23.4°C.
December runs -1.2°C compared to Island Harbour's annual average high of 28.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 27.7°C and cooler evenings around 23.4°C.