The general practice, assuming that there are no physical barriers in place, is to go to the nearest overhead projection and imagine a 45 degree line, toward the structure. Above this line is considered "damp;" below it "wet." So, if you assume a porch 10 ft deep, with an overhang 8 ft. above the decking, receptacles on the inside wall would be in a 'damp' location.
The same rule can be applied to receptacles directly under the eaves. And, of course, there would be little sense in using a 'bubble' cover for a receptacle that faced 'down.'
Now .... here's the catch .... there is a general requirement that equipment be suitable for the environment in which it is installed. I would use this as a reason to use a "Bell" box in nearly any outdoor location, however it may be sheltered. Why? Insects. I'm tired of trying to remove covers, only to see six furry legs trying to pull the covers back on!
All those little holes in 'normal' boxes make them havens for wasps and spiders.