

Single digits, 100%.
Single digits range from -9F to 9F. Triple digits start at 100F, and can go way the fuck up from there. (And with climate change, they will!) Once you start approaching triple digits, you have to worry about humidity, because you can easily hit a combination that’s literally too hot to live.
Is -9F unpleasant? Sure. But you can layer clothing, and that will keep you comfortable. Death Valley has hit >130F, and when that happens people die, even if they drink gallons of water and stay in the shade.
Currently doing exactly that. My partner and I just bought a house and a few hundred acres in northern Maine, and will be moving in less than two months. Yeah, winters are cold and long, and yeah, the mosquitos and blackflies suck, but triple digit heat is really rare up there.