January weather forecast in Allentown

January in Allentown is the snowiest and the coldest month of the year. In January, the weather in Allentown is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Allentown has 13 partly cloudy, 7 sunny, 5 rainy, 4 cloudy, and 2 snowy days in January. The rains are usually moderate. January as well as February, March, and December is considered the most uncomfortable time to visit Allentown.