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 21 degrees above zero. On average, Pasadena has 19 sunny, 5 partly cloudy, 4 rainy, and 2 cloudy days in April. The rains are usually light. April as well as May, June, October, and November is considered the most comfortable time to visit Pasadena.