In December, the weather in Namatanai is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Namatanai has 20 rainy, 6 sunny, 3 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Namatanai.