When I boot into Bootcamp on either my MacPro or Macbook Pro the temperature increases drastically. This is How To Cool Down a Mac While Using Bootcamp.
Input Remapper allows you remap the fan speed of your mac while using Bootcamp. It also allows you to remap some keystrokes and other options as well. I however primarily use it to increase the fan speed to prevent overheating.
This app is a must have for those who dual boot using Windows and Bootcamp.