January in Salerno is the coldest month of the year. In January, the weather in Salerno is typically warm. Average daily high temperature in January is about 11 degrees above zero. On average, Salerno has 12 sunny, 11 rainy, 7 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as February is considered the most uncomfortable time to visit Salerno.