January in Namatanai is the rainiest and the cloudiest month of the year. In January, the weather in Namatanai is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Namatanai has 25 rainy, 5 sunny, and 1 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 Namatanai.