February in Nantucket is the coldest month of the year. In February, the weather in Nantucket is typically cold. Average daily high temperature in February is about 3 degrees above zero. On average, Nantucket has 10 sunny, 7 rainy, 7 partly cloudy, 4 cloudy, and 1 snowy 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 Nantucket.