Oak Bushes is now a cold zone?

I’m farming in Oak Bushes this morning and suddenly I’m hit with the freezing icon. I’m fairly new to the area, however I’d not see the cold icon in my previous trips to this location and I’ve stayed in the zone to fully clear the area before. Is this new or did I just get lucky the previous times?

Oh and I’m using the same non fur clothing I was previously and now I’m starting to freeze in under a minute.