+350dm Aleutian High for the month.. Nothing really comes close, until December 2021.

30.7. No other January even close...next coldest was 6 degrees warmer.

Upsets happen

Only 2 days above 40 here that month.

Yes. There were several warm ups this far south in 1950, a couple days in the 50s at SLE. Still exceptionally cold and much more extreme than 1949, that month just had no warm up.