March in Gig Harbor is the windiest month of the year. In March, the weather in Gig Harbor is typically warm. Average daily high temperature in March is about 11 degrees above zero. On average, Gig Harbor has 19 rainy, 4 sunny, 4 cloudy, and 4 partly cloudy days in March. The rains are usually heavy. March as well as January, February, November, and December is considered the most uncomfortable time to visit Gig Harbor.