January in Pennsville Township is the coldest month of the year. In January, the weather in Pennsville Township is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Pennsville Township has 13 partly cloudy, 9 sunny, 8 rainy, and 1 cloudy day in January. The rains are usually moderate. January as well as February, March, and December is considered the most uncomfortable time to visit Pennsville Township.