In December, Ko Samui typically sees daytime highs of 28.6°C and overnight lows around 23.2°C. Compared to the annual average high of 30.3°C, December runs -1.7°C.
December in Ko Samui averages a daytime high of 28.6°C and an overnight low of 23.2°C.
December runs -1.7°C compared to Ko Samui's annual average high of 30.3°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 28.6°C and cooler evenings around 23.2°C.