In mid April, the average high is about 81 / average low about 60. Chance of precipitation is 15-20%. Of course, this is Florida so temps can be significantly higher and rain can come with the humidity. Our experience has been 80's during the day(shorts,t-shirt, swimming weather), upper 50's - 60 at night (shorts/light fleece), not humid. Pleasant. It's one of our favorite times of the year to visit.