April in Austin is the windiest month of the year. In April, the weather in Austin is typically warm. Average daily high temperature in April is about 14 degrees above zero. On average, Austin has 11 rainy, 9 sunny, 5 cloudy, and 5 partly cloudy days in April. The rains are usually heavy. April as well as March, May, October, and November is considered the most uncomfortable time to visit Austin.