Sounds like the OP might need to have his AC serviced. I've never had this issue, and I don't live in a climate nearly as ideal as Southern California.

 

Yall need to understand Jibber isn't happy unless he has something negative to complain about. He's like, "OMG the sun is out and I'm sweaty sitting in my OB coupe with all the windows up I'd best make a thread and whine!" The rest of us would just run our windows down and enjoy spring weather and fresh air, not Jibber....
Gary

 

lol i have to agree though with the shin thing. my legs are always burning even with the AC on... it feels like theres no seperation from the cabin to the engine bay

 

I know I'm late to chime in but my car does the same. In the middle of winter my car gives off eat from the floor somewhere. All vents are off and set to recycle. Windows are closed and you can feel the heat just roll in.
My car is white with no tint with Wheat colour seats. So i know it has nothing to do with sun, radiation, induction, microwaves or any other cosmic explanation.