Yeah, I guess so. It has in the previous games. It will eventually fade normally when the colder months comes, but if you want to make it go away now I think carrying an umbrella would help?
Once the tanning season is over, your tan will stop getting "renewed". Some time in September? But you can already start getting rid of it now by wearing hats (not all hats will stop you from tanning) or masks that cover your face or even lemon/cucumber packs. I think the mii mask works too? Or use an umbrella, as Lykke says.