Without diving into the stats, with how snowy/cold febs have been here recently, and the thaws in January recently, you'd never guess we've never hit 70 in january.
Looks like Detroit hit 72. Pretty incredible to break the all time feb high. Obviously alot of factors to take into account when trying to figure out why we're seeing warmer temps in winter recently.
You almost have to expect some historic snowstorm in a few weeks, when everyone just starts to get used to the continued 50s/60s.