IIRC the 107° was the New Bedford COOP, but the airport was cooler. You don’t usually see discrepancies like that today which makes me question instrumentation/siting. PVD 104° and BOS 102° though so it wasn’t too far off.
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.