May in Te Anau is the cloudiest month of the year. In May, the weather in Te Anau is typically cold. Average daily high temperature in May is about 7 degrees above zero. On average, Te Anau has 20 rainy, 7 cloudy, 3 sunny, and 1 partly cloudy day in May. The rains are usually heavy. May as well as January, March, April, and June is considered the most uncomfortable time to visit Te Anau.