April in Galveston is the windiest month of the year. In April, the weather in Galveston is typically warm. Average daily high temperature in April is about 23 degrees above zero. On average, Galveston has 18 sunny, 9 partly cloudy, and 3 rainy days in April. The rains are usually heavy. April as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Galveston.