April in Pasadena is the windiest month of the year. In April, the weather in Pasadena is typically warm. Average daily high temperature in April is about 25 degrees above zero. On average, Pasadena has 16 sunny, 7 rainy, and 7 partly cloudy days in April. The rains are usually heavy. April as well as October and November is considered the most comfortable time to visit Pasadena.