I enjoyed this and respect citizens who feel motivated enough to look at underlying data..
This type of discourse ("here is what I did and here is what I saw") leaves room to comment and make progress. People can discuss measurement methods, statistical analysis, and other objective things about a tightly scoped project like this.
This is very clear reading the comments in the substack. A comment exchange that reminded me of my days in grad school:
commenter:
"What I think can be taken conclusively from this survey is that temperature is quite regionally variable, and there are a variety of different trends over time in these locations. Do you feel that there is some more significant conclusion that can be drawn from this?"
author:
"I am hesitant to draw any conclusions. I am more in a state of examining the data itself and asking questions."