mine is around 37 - 42c when idle (hot days its 42c) and around 47 - 49c when in use for a while, it has been as high as 53c on very hot days.
I never turn off the device as the device has to be manually turned on and I have to edit one of the network shares to get shares to work every time the device is restarted. (power outs are a b1tch).
Rodney