March in Lahaina is the rainiest month of the year. In March, the weather in Lahaina is typically warm. Average daily high temperature in March is about 23 degrees above zero. On average, Lahaina has 19 sunny, 9 partly cloudy, 2 rainy, and 1 cloudy day in March. The rains are usually light. March as well as January, February, April, and May is considered the most comfortable time to visit Lahaina.