January in Penafiel is the rainiest, the windiest, the cloudiest, and the coldest month of the year. In January, the weather in Penafiel is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Penafiel has 16 rainy, 9 sunny, 3 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Penafiel.