I would say that’s still a manageable temp to go vote in, if you’re spending little time out of doors, rather going house-to-car-to-building. Any significant requirement of time spent outside, particularly idling in line; changes that.

That answer is also changed depending on the state of the ground/roads. Is there a significant amount of ice about? In neighbouring Wisconsin there is.

Also, a lot of voters, particularly conservative ones, are older, and the perils of the ice and deep cold are greater for them, and likely considered as such.

So… yeah. I can see weather dampening turnout at this quite a bit.

-5°F/-15°C is seriously dangerous to go out in regardless of what you're wearing.

That's funny

I'd say that line starts at -25 / -30°C not -15. Unless you literally don't have any proper winter clothes.