You can see our area's extremes and means records...

It looks like a lot of record highs for winter in this region occurred in the late 1800s/early 1900s. This was also during the industrial revolution, so it makes sense that the highs would occur during that time, however you think it would have steadily gotten worse.

So why hasn't it gotten worse? I'm not saying that global warming isn't a thing or isn't detrimental, pollution is pollution and I'm all about keeping ecosystems in place, however "unusually high temp for this month" isn't the smoking gun folks tend to think it is.