July in Biak is the coldest month of the year. In July, the weather in Biak is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Biak has 28 rainy, 2 partly cloudy, and 1 sunny day in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Biak.