Is it normal for a MacBook Pro to run so hot?
See here for info on how to get the specifics for your processor.

150F is an OK temperature for the processor to be running at. Here's a nice guide on everything you need to know about intel temperatures. 

System control for the fans generally tries to balance the need for the fans with the noise made by the machine, meaning the fans are left off for as long as possible. But the designers know the thermal limitations of the CPU and have measures in place in software to protect it against thermal damage, so you shouldn't be worried about it.