Hi Jeff, not sure what you mean by low wing temperature wise, but I will assume cockpit temperature under a bubble canopy.
With the aircraft sitting on the ground on a sunny warm day it can get quite hot, especially with polished wings that focus sunlight on the cockpit like a big solar reflector!
Its get hot enough to shutdown the iPad in a few minutes, so I don't leave it in the cockpit during a fuel stop or chin wag session.
Once airborne I haven't noticed the reflections, or the glasshouse effect quite so much.
I have good cockpit venting which helps.
The warmest day I have flown was around 36C on the ground no cloud cover, quite comfortable airborne at height but a hat is a must for the noggin and a good dollop of sunscreen.
Some guys have fitted a Koger sun shade or the cheaper alternative of car stick on shades to cut down the sunshine.
I haven't flown in winter yet but I believe the solar effect is quite good to keep the cockpit comfortable if its a sunny day.
Cheers
Tony