NOAA publishes something called “raw” monthly data – which is supposed to be unadjusted. It shows 2012 super-duper hot.
Only problem is, this “raw” data has been massively altered. The graph below shows the difference between the “raw” monthly temperature and the GHCN HCN daily data which it is derived from.
NOAA has blown away the record for data tampering in 2012 – by a very large margin.
US temperature data from NOAA is complete crap.