January in Wewak is the cloudiest month of the year. In January, the weather in Wewak is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Wewak has 27 rainy, 3 cloudy, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Wewak.