March in Arcata is the rainiest and the windiest month of the year. In March, the weather in Arcata is typically warm. Average daily high temperature in March is about 11 degrees above zero. On average, Arcata has 16 rainy, 8 sunny, 5 partly cloudy, and 2 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 Arcata.