They didn't have my hometown (Rochester, NY) stating that it is not prone to 90F days. I looked up the weather reports for the last 3 months and found there have been 15 days of >90F temperatures. Meanwhile, Boston had one third the number of 90F days and is included in their data. Nearby cities like Buffalo and Syracuse are included.
I was expecting a completely different result.
According to the site:
1965: 31 days over 90
2018: 25 days over 90
Interesting.