March in Puerto Vallarta is the sunniest month of the year. In March, the weather in Puerto Vallarta is typically warm. Average daily high temperature in March is about 25 degrees above zero. On average, Puerto Vallarta has 21 sunny, 8 partly cloudy, 1 rainy, and 1 cloudy day in March. The rains are usually moderate. March as well as January, February, April, and December is considered the most comfortable time to visit Puerto Vallarta.