The first consideration in wondering if this is an issue worth bothering with at all, is how long do you use a pen for? What are your daily Apidra requirements?
The reason is, that if we are talking a pocket life of just a week or so, I think it would take really quite extreme temperatures - more extreme heat than you are talking - to be affecting your insulin. This is based on nothing more than my experience (where a couple of times week of 40c+ days has appeared to reduce my rapid performance - but not provable) and on an extrapolated guess from the guidelines, which state that a month of room temperature (or below about 30c, I think) result in zero or negligible degradation of action. You might want to check that with your pharmaceutical notes. I don't know of anything official that suggests Apidra is different from other rapids with this issue.
All that said, one of the best way to test something is to shake up your habits and observe the difference. You could carry your pen in something that insulates it from temperature extremes and movements for a few weeks, and observe if the evenness of the action improves. If it does - it could still be coincidence and something else, but you would have a theory and a practise to adopt.