yeah definately, your body will adjust, I have been running again for about 3 weeks and I can run at noon the hottest part of the day. At first I had to run around 4 p.m. when it was cooler but I just started pushing my body farther and farther. Like the other post, just make sure you drink alot of water through out the day before and after running. I have started to drink water and only water every day and it helps alot with the heat while running because I stay hydrated through out my 2 to 3 miles I run a day. So I think you should just start off gradually or running later on in the evening because running outside is alot more enjoyable and alot easy to keep up than running on a treding mill. They get boring I've found and it is alot harder to go longer distances because you get bored alot easier.