In Dacula, Ga yesterday the temperature it 78 as the high and we are at 30 this morning.
I remember living in Texas in the early 80s and it was over 100 in the Rio Grande Valley and snow in Lubbock on the same day.
Of course it fluctuates/varies in trends even by the decades, and there are the geographical anomalies, but the overall long term global average has been headed colder for the last 10,000 years.
It was warmer during the last interglacial than it has reached during this current interglacial. And judging by the chart I shared we are actually late for the relatively rapid drop as the previous glacial periods exemplify.
But out here in the desert it is pretty common to have drastic differences from highs to lows as you mention. But the last three years summers has come way late, and winter has been coming far sooner than normal.