February in Milford Sound is the warmest month of the year. In February, the weather in Milford Sound is typically warm. Average daily high temperature in February is about 13 degrees above zero. On average, Milford Sound has 17 rainy, 7 sunny, 4 partly cloudy, and 1 cloudy day in February. The rains are usually heavy. February as well as January, March, April, and May is considered the most uncomfortable time to visit Milford Sound.