You are right, Ann, it usually is an inferno here in July-September! It'll be interesting to see what happens this year.
About planting all year around. I've tried planting daylilies in March and the plants either died or stunted. Ended throwing them away. I try to get them into the ground by Thanksgiving (starting mid- to late October and working daily), and this has worked really, really well. It is great for me, too, because the weather usually cools off in October and it's so much more pleasant outside. No bugs either.
My tropical plants can be planted at almost anytime, but I start on them after the first of February. That when most of the big plant show/sales happen. The plants appreciate winter being behind them when the get in the ground.