Depends. I mean, they tend to dress pretty.. weirdly. But yeah, it is not like the peasants will instantly know he's a wizard, and they will have little understanding of the different schools of magic. So they will probably see, as long as he dresses the part, that he is someone at least a couple of steps higher up the social ladder than them. Which means someone they should be deferential to but try to not get entangled with, as it can easily lead to problems.
Someone in the village might whisper about how he heard wizards dress like that and word might get around. But nothing will be confirmed until he uses magic or actually says he is a wizard.
Notice that this can also happen to someone who is not a wizard but just happens to like robes
It is really up to you and what you feel fits the story best. Some villages will have a very "burn the witch!" attitude towards magic users, while others will just be in awe.
Edited by Ralzar