According to weather.gov [1] the temperature of Salt Lake City has never exceeded 100 in September. This is making me question the rest of your comments.
[1] https://www.weather.gov/media/slc/ClimateBook/September%20Ma...
[1] https://www.weather.gov/media/slc/ClimateBook/September%20Ma...
Now they did say "in the summer" rather than "in September", and I certainly believe it regularly gets up to 102 in Salt Lake City and the surrounding area in the summer. In which case I still question why they would make the comment about 102 in the summer and use that to imply skepticism of the rest of the reporting.
Sorry for being slow.
(Edit: just saying I now understand the point trying to be made, not that I agree or disagree with it.)