April in Princeton is the windiest month of the year. In April, the weather in Princeton is typically cold. Average daily high temperature in April is about 7 degrees above zero. On average, Princeton has 11 partly cloudy, 6 rainy, 6 sunny, 6 cloudy, and 1 snowy day in April. The rains are usually moderate. April as well as January, February, March, and May is considered the most uncomfortable time to visit Princeton.