In reply to EllieEP:
I did it about 12 years ago as part of an organized trek. We spent a week walking from village to village around the Atlas, then finished by doing Toubkal. It was really good to do it that way, as much of the rest of the trip was quiet and remote compared to the relatively busy Toubkal, and it gave me a much better experience than just "bagging it" would have done for me.
The other thing we did, which is highly recommended if conditions and abilities allow, was to climb it at night and arrive on the summit at sunrise. I'll never forget that.
We were in mid-September, and it was still hot and very arid. I assume you'd have it a little cooler.
Enjoy!