That's not to say there aren't problems there. I just wouldn't use the data he did to try to prove it.
I mean wtf is this toward the end of 2019? (edit...looks like multiple stations in NC had an issue at that time so that jump is something different.)
CON goes back to 1856, but the max/min thermometer official readings began in 1868.
And I was wrong on that...1911 was 102F as well.
They had a 103F in August of 1864 and 102F in July of 1866, but there may be some "yore" in there.