April in Jacksonville is the windiest and the sunniest month of the year. In April, the weather in Jacksonville is typically warm. Average daily high temperature in April is about 25 degrees above zero. On average, Jacksonville has 18 sunny, 6 partly cloudy, 5 rainy, and 1 cloudy day in April. The rains are usually light. April as well as March and November is considered the most comfortable time to visit Jacksonville.