For nearly five decades the official weather reporting station in my small hometown in South Dakota was within twenty feet of a large west facing brick wall of the old city auditorium. The locals, who had there own thermometers, frequently complained that the official high temperatures reported in the weekly newspaper, were always degrees hotter than what they noted on there thermometers. When the gentleman who operated the weather station passed away, the official weather station was moved to a new location in the middle of a large back yard away from any buildings and the reported high temperatures immediately began to more or less agree with what the locals were noting.
We have had basically the opposite N. of Gay Frisco.
Weather stations from semi normal sites were closed down, and the new stations were often in heat sink areas. So supposedly temps went up, and they didn’t!
People, who dared to point out these changes were hammered in local news papers.