I'd say it should finish a bit lower than 1016 - probably around 1012-1014.
OK, I don't know why I was thinking it would go down to like 1005 ish
To be sure, take a sample (hydrometer tubes worth), put in a stubby and take inside. Stick in a warm water ath (30 -35 dgerees - not too hot) and shake every time you think of it. Keep the water between 20 and 30 degrees. Measure the gravity in a couple of days - if it's dropped then the fermenter brew should drop.
That's a great idea, thanks!
Don't put the sample back in the fermenter please.
Such a travesty would never happen in my house!