They are in front of the elevators at an outdoor multi story parking garage around my area. That's all I wanted to share, thanks.
That's -40f for those south of the border.
No need to thank me for doing all that math. On a serious note, some actually helpful points are:
0c = 32f (probably the most well known one)
10c = 50f
20c = 68f
30c = 86f
40c = 104f
Aside that, I figure I'll be cooking and therefore using a nice enough thermometer to have both scales. Otherwise things have gone terribly, terribly wrong, and I have much larger problems to worry about than conversions.