Well.. I'm over my head on this one , but here goes...
I believe the difference would be so small that it would be very difficult to tell any difference at all unless the distance was extreme = 200yrds or so. I believe that the biggest effect on any projectile in flight(environmentally speaking) would be humidity or lack thereof, not temperature.
In highpower rifle competition, I believe the order of importance for impact compensation is mirage, humidity, barometric pressure, then temperature.
I'm sure someone on here knows for sure. Till they chime in...there's my best answer/guess.