January in Puerto Vallarta is the coldest month of the year. In January, the weather in Puerto Vallarta is typically warm. Average daily high temperature in January is about 24 degrees above zero. On average, Puerto Vallarta has 20 sunny, 10 partly cloudy, and 1 rainy day in January. The rains are usually light. January as well as February, March, and December is considered the most comfortable time to visit Puerto Vallarta.