Look at the huge "adjustments" to raw data -- US maximum daily temperatures for January through December, since 1895

(A) 
NOAA raw data 
for US maximum 
temperatures:

(B)
NOAA "adjusted" data  
for US maximum 
temperatures

.
.
(C) (below)  
NOAA raw and adjusted data 
on the same chart, 
with the 5-year averages:

.
.
(D)  (below) 
NOAA "global warming" 
created by "adjustments"
= (B) minus (A):

.
.
(E) (below)
NOAA sets a brand new 
junk science record:
47% of data are wild guessed 
by government bureaucrats 
= no temperature measurements
for those 47% of "data" !