Mid-April is school vacation time, so it is usually jammed. But... when we went, we had to wear windbreakers for four days straight! It was 62 degrees!
We went this past April vacation week (23rd-30th) and we had beautiful weather, sunny, mid eighties and only needed a light sweater for the evening (or airconditioning)! When were you there? We usually go in May so I was relieved we had good weather!