I have a 01 Dodge neon with over heating problems.

What is your question?

My neon only over heats during the Arizona 100 degree weather. When the temps is 90 and lower the car does perfect. When the temps reaches over the 100's i can drive for a little with my a/c on then that's when the over heating starts then i have to shut my a/c off, even sometimes turn on the heater to bring the car temp back down to normal to get to my destination. Things that have been replaced on it water pump, hoses, and radiator cap. I only run antifreeze in my radiator no water. Any ideas from what is have explained would be greatly appreciated.

What makes this problem better or worse?

It's at its worse when outside temps are over 100 degrees

How long has your 2001 Dodge Neon had this problem?

Since last summer.