January in Casoria is the coldest month of the year. In January, the weather in Casoria is typically warm. Average daily high temperature in January is about 11 degrees above zero. On average, Casoria has 13 rainy, 10 sunny, 4 cloudy, and 4 partly cloudy days in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Casoria.