Lancaster, Wisconsin used to have very hot summers. Days over 100 degrees used to be very common until 1940, and days over 95 degrees used to be very common until 1990.
From 1996 to 2011, there were no days over 95 degrees.
Suffice it to say, Lancaster, Wisconsin used to be much hotter. The raw data shows two to three degrees cooling since the 1930s.
But after NOAA is done tampering with the data, this is what they publish – a warming trend :
If anyone in industry did this, they would likely be prosecuted for fraud.