iMac running very hot

My iMac is runinng very hot. I have downloadet a Temp software, and pasted my data below in F and in C. There is NO other software than Safari running right now, while I was running iTues it was even hotter

Best Regards

Kurt

Ambient Air: 91℉

CPU A Heatsink: 131℉

CPU A Proximity: 136℉

Display Screen Proximity: 118℉

Graphics Processor Heatsink 1: 129℉

Graphics Processor Temperature Diode: 131℉

Main Logic Board: 138℉

Optical Drive: 120℉

Power Supply Position 2: 169℉

Primary Heatsink: 149℉

SMART Disk WDC WD5000AAKS-402AA0 (WD-WCAWFD809344): 133℉

Secondary Heatsink: 190℉

CPU Core 1: 136℉

CPU Core 2: 133℉

CPU Core 3: 138℉

CPU Core 4: 129℉

Ambient Air: 33℃

CPU A Heatsink: 54℃

CPU A Proximity: 57℃

Display Screen Proximity: 48℃

Graphics Processor Heatsink 1: 54℃

Graphics Processor Temperature Diode: 56℃

Main Logic Board: 59℃

Optical Drive: 49℃

Power Supply Position 2: 75℃

Primary Heatsink: 65℃

SMART Disk WDC WD5000AAKS-402AA0 (WD-WCAWFD809344): 55℃

Secondary Heatsink: 87℃

CPU Core 1: 56℃

CPU Core 2: 55℃

CPU Core 3: 57℃

CPU Core 4: 53℃