Our temps for this Spring are like that too Alice, with just the occasional high 90's. Mine has not bloomed yet, it is trying to make it. I usually get my blooms in July when the heat is between 85F to 90F and lots of direct sun on it.
Though we do not have much rain, that is the difference though, we are much drier, humidity lower. This year's Spring is definitely cooler compared to previous years.
I kept my Adenium in the same container, though I did trim off roots and branches in Feb 2016, so I can keep it in same container. It bloomed nicely in June that year, while this year it took its time to wake up properly. It was hotter that year, so it is not the same year to year at times.
For me as long as the overall plant is okay, caudex firm and solid, it is still okay. Just got to give it time to reach the conditions it prefers.
