I remember a day in Columbus Ohio, it was 20 with a wind chill of 40 degrees, so it was actually -20. My breath froze on my glasses, I couldn't take them off because they were the only thing keeping my eyeballs from freezing solid, so I had to stop every eight steps or so and turn around to let the ice melt ... I guess that's the coldest I've ever been. Thank goodness for a wool coat!