In April, the weather in Castelnuovo del Garda is typically warm. Average daily high temperature in April is about 15 degrees above zero. On average, Castelnuovo del Garda has 18 rainy, 8 sunny, and 4 partly cloudy days in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Castelnuovo del Garda.