I didn't run at all over the past few days when temperatures reached more than 30 degrees every day. It knocks me around too much. Today, with temperature dropped a whopping 18 degrees, down to 13, I took the opportunity to stretch the legs before tomorrow's tempo run. I used the same incline as I did a few weeks back.
Jog 15 min warm-up
Run fairly hard uphill for 60 seconds ....(this distance for other reps but not timed).
6 x incline
Walk down recoveries
15 min cool-down.
That should get me started again!