30.3 degrees Centigrade at the moment for me (I think it's about 86 Fahrenheit). Not really doing anything fancy with my phone at the moment though.

 

It never burns my hand, so I don't worry much about it.

 

Mines far cooler than my old Galaxy S2. That phone did used to get hot, hot, hot

 

I find that dialing *#*#4636#*#* leads to the battery temperature, but how does one discover the CPU temp.? The CPU is the greatest source of heat in the unit, and it would be good to have a number for that.

Twice this past weekend the phone shut down with a nearly-full battery and wouldn't restart to a working level until I took active steps to cool it, so I'm assuming these were heat-related shutdowns. Running apps included navigation and online radio while the unit was charging on the car seat in the sun.

 

my battery has hit up to 104 f but never shut off on me or exploded, so it's all good usually heats up the most when i'm on netflix