I have ran mine in 105 degree weather and it definitely runs hotter on the gauge but usually around 87 degrees when moving and around 90-92 degrees when sitting at the light or in traffic. Was gonna ask about your auxilary fans...are they on as well when it's running hot? If so, what else can it be beside flow or radiator? Have you replaced the water temp sensor? It's cheap. It doesn't seem like they designed these cars to run in hot climates like Phoenix...and it is SMOKING hot there in the summer!