If it is much over the range then, check the following:
Make sure that you have a PSU Atx Version 2.2 at least. Make sure that the chassis is TAC - Thermally Advantage Chassis Check for proper aeration in the chassis. (cable) Re-integrate the cpu with new small amount of thermal paste (clean the cpu before)
Read the temperature from the bios or if it is an Intel desktop board, use Intel (R) Desktop Utilities.