In April, the weather in Parsippany-Troy Hills is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, Parsippany-Troy Hills has 12 rainy, 9 sunny, 6 partly cloudy, and 3 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and November is considered the most uncomfortable time to visit Parsippany-Troy Hills.