I have taken temp readings with a meter and on the ground they usually peak on the low side as well. However, in the air the engine is loaded and depending on cowl inlet/outlet, aircraft attitude/speed and other factors can exacerbate things. The only way to be sure is to remove the cowl and fly it, put the cowl back on and compare results.

You probably don't have a problem with high temps but lousy trasitions at mid to high throttle are usually what I have experienced with engines that are running to hot.