My family lives there. It's considered mild relative to the Arctic, one of the harshest environments on earth, but it's not compared to most places people actually live. Hurricane force winds and blizzards are extremely common during the winter months. You can open the windows in spring and summer if you're willing to deal with the bugs (which don't include mosquitos, thankfully), but you'll mainly be outside already trying to get your annual supply of vitamin D. Storms are fairly common most months, like everywhere else in the North Atlantic.