80F and humid with some rain is quite okay with it actually and full sun. It is right now enduring a very dry 101F and higher here.
Do not make the media way too dry at this time, it is its active growing time. But you would certainly need to improve your media. make it grittier, since you do get rains so it needs to drain well.
I start to bring indoors my Plumeria in late Fall, once overnight temps starts going 50F. It will not take the cold and even more too cold and wet. I just let it go dormant all the way to winter and wait for it to wake up again in Spring.
