December in Kuala Lumpur is the coldest month of the year. In December, the weather in Kuala Lumpur is typically hot. Average daily high temperature in December is about 30 degrees above zero. On average, Kuala Lumpur has 27 rainy, 3 cloudy, and 1 sunny day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Kuala Lumpur.