Yeah, cold in South Dakota is not really news! grin I grew up in SD (if I can truly claim to be grown up that is). Twice I can remember temps of -35 F, once when I was a kid in the 70's and once about three years ago. It wasn't that uncommon to hit -20 and you'd often have two week spans where it never got above zero. After that I moved to Minnesota for a couple years so not really a reprieve from the cold.

Nowadays I'm in Bozeman, and just by a fluke we've only had a couple sub-zero days, and even then just barely below zero. I know it gets cold here but it's been a very mild winter so far (knocking on wood!).
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman