December in Jayapura is the rainiest month of the year. In December, the weather in Jayapura is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Jayapura has 30 rainy and 1 cloudy 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 Jayapura.