It's probably hidden in plain sight in your username
Try Mass Super Skunk/Critical Mass up there. It finishes before frost. So will Early Girl, Mighty Mite, Niagara, Donkey Dick, and a few other Canadian outdoor strains. As far as I know, all the strains I just listed have a skunk in their heritage.

Edit: This is for next year, right? The drop-dead date outdoors down here at 45'N lat is July 1st, to have vigorous young plants (ideally sexually mature, so 6 weeks) in the ground. You'd have wanted it even earlier since cooler temps mean slower growth.
stinkyattic Reviewed by stinkyattic on . re:good strain for outdoors Latitude: 48° 25' North /Longitude: 89° 14' West What would be the best strain :hippy: for the the best quality and yeild? :) Rating: 5