So I noticed a temperature monitor cleverly labeled "Ambient." Knowing that the sensor is inside my computer, I can get a decent temperature check on my overly hot dorm room if I check it as soon as I wake my computer from sleep. I was curious if there was some way of logging temperature data for different parts of the day, ignoring the times where the processors are making the ambient temperature rise?
I'm sure it's possible via SNMP. There are plenty of guides on the Internet how to set up SNMP on OS X, including this one: http://support.apple.com/kb/TA20884?viewlocale=en_US from Apple.
The next way would be to set up mrtg/cacti to monitor the sensor.
If you're looking for a GUI utility, you can for example Temperature Monitor http://www.macupdate.com/app/mac/12381/temperature-monitor