Funny, the Star Magnolia's were also bloomed and even though they are delicate, their blooms were fine in the colder temperatures.
Normally the Magnolia would bloom mid-May. It was nearly 2 months early this year because of the 80 degree temperature! Isn't that alarming? I think it is.
Now the temps are more normal, so all the spring blooming trees (other than the delicate Magnolia's and Azalea's) are holding on to their blooms longer. It's like when you have cut flowers at a florist and they put them in the refrigerator.