December in Te Anau is the rainiest month of the year. In December, the weather in Te Anau is typically warm. Average daily high temperature in December is about 14 degrees above zero. On average, Te Anau has 22 rainy, 5 partly cloudy, 3 cloudy, and 1 sunny day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Te Anau.