Here's the operating range for Core temperature:Core temperatures above 85°C aren't recommended
.http://imgur.com/Svr2si8.jpgCore temperatures increase and decrease with Ambient temperature
Highest Core temperatures occur during stress tests, rendering or transcoding, but are lower during less processor intensive workloads such as applications and gaming. Core temperatures vary greatly between games as CPU workloads differ. Idle temperatures below 25°C are generally due to Ambient temperatures below 22°C.
Also, you might want to read this Sticky: Intel Temperature Guide