What to think about NOAA's "Climate at a Glance" (CaaG) website that even skeptics like @JunkScience like to use? 
Are the data adjusted towards a warming bias vs. original raw data?
Yes, heavily. The graph compares CaaG to NOAA's own data set iterations for LA Airport (v2 until 1984).
Cool the past. 
@_ClimateCraze