March in Bar Harbor is the cloudiest month of the year. In March, the weather in Bar Harbor is typically cold. Average daily high temperature in March is about 2 degrees above zero. On average, Bar Harbor has 10 cloudy, 8 rainy, 6 partly cloudy, 5 sunny, and 2 snowy days in March. The rains are usually moderate. March as well as April, May, and December is considered the most uncomfortable time to visit Bar Harbor.