April in Valparaiso is the rainiest month of the year. In April, the weather in Valparaiso is typically warm. Average daily high temperature in April is about 14 degrees above zero. On average, Valparaiso has 14 rainy, 7 sunny, 5 partly cloudy, and 4 cloudy days in April. The rains are usually heavy. April as well as February, March, November, and December is considered the most uncomfortable time to visit Valparaiso.