The graph below plots the average temperature (by year) of all valid daily maximum and daily minimum readings, for all USHCN stations since 1900. As you can see, there has been no warming in the US, and the three hottest years (in order) were 1921, 1934 and 1931.
Also note that 2008 and 2009 were two of the coldest years on record in the US.
Before they started tampering with the data in the year 2000, all the experts agreed that the US was not warming,
Phil Jones and NOAA agreed in 1989 :
February 04, 1989 Last week, scientists from the United States Commerce Department’s National Oceanic and Atmospheric Administration said that a study of temperature readings for the contiguous 48 states over the last century showed there had been no significant change in average temperature over that period. Dr. (Phil) Jones said in a telephone interview today that his own results for the 48 states agreed with those findings.
James Hansen agreed in 1999
Empirical evidence does not lend much support to the notion that climate is headed precipitately toward more extreme heat and drought. The drought of 1999 covered a smaller area than the 1988 drought, when the Mississippi almost dried up. And 1988 was a temporary inconvenience as compared with repeated droughts during the 1930s “Dust Bowl” that caused an exodus from the prairies, as chronicled in Steinbeck’s Grapes of Wrath…..
in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country
The US has the best temperature record in the world. There was no valid reason to tamper with it.
You can see the changes that GISS made after the year 1999, in the blink comparator below.