I am another case similar to Catrin. My asthma is mild and only flares up once in awhile, mostly never. I use the Albuterol before a ride ifI am not feeling well, i.e. allergies are flaring up. I tried Advair and Singulair (which is more for allergies) a couple of years ago. There were no visible improvements, and I stopped taking it. And the potential side effects scare me. Once my allergies are under control, which they are now that I take medication for that on a regular basis, the asthma goes away. Since I have osteoporosis, I am not about to take a steroid on a regular basis. I even stopped taking Flonase.
Riding in the heat and humidity does bother me, but I seem to have built up some tolerance to it. I used to get asthma/allergy induced bronchitis on a regular basis in the fall (even in AZ), but I haven't had that in many years.
My asthma is somewhat strange. I rarely, if ever wheeze, just get the constriction.