August in Jayapura is the sunniest month of the year. In August, the weather in Jayapura is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Jayapura has 24 rainy, 6 sunny, and 1 partly cloudy day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Jayapura.