However, an officer must have Reasonable Articulate Suspicion that a crime is "afoot."
Someone walking down the street at 1 a.m. would not lead someone to believe that a crime is afoot -- unless of course there were aggrevating circumstances. It would not stand scrutiny if an officer stated the reason he stopped someone was because they were walking down the street late at night.
If that same person was walking down the street, acting suspicious and wearing a ski-mask when it is 70 degrees outside then it would constitute RAS to conduct a stop.
I cannot see the picture you have loaded onto the post, so I cannot comment on it.