April in New Philadelphia is the rainiest month of the year. In April, the weather in New Philadelphia is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, New Philadelphia has 17 rainy, 6 sunny, 4 cloudy, and 3 partly cloudy days in April. The rains are usually heavy. April as well as January, February, March, and December is considered the most uncomfortable time to visit New Philadelphia.