I have the ASUS 1015PEM netbook with the dual core N550 Atom.
Presently running KDE and making a damn fine job of it too.
Core temperature averages 65 degrees C. ( 149 F )
According to Intel, the upper operating temperature is 100 degrees C. ( 212 F )
CPU shutdown takes place at 125 degrees C. ( 257 F )
So it looks like you are well within the safety zone.
FYI the Atom N550 TDP is 8.5 watts and monitoring is courtesy of Conky.