In December, the weather in Kota Kinabalu is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Kota Kinabalu has 26 rainy, 4 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, March, April, and May is considered the most uncomfortable time to visit Kota Kinabalu.