Since all my tropical plants are under large oaks and cedar trees, they will stay cooler. We get in the mid to upper 90's all summer long and it is not unusual to get above 100. Also being under large trees, my plants will only get morning sun or late afternoon sun, which is ideal for most tropical plants. Well, my plumeria get full sun but a few of them will even have to be shaded a bit in the harshist part of summer.