If the
moderators will permit a partial repost of a comment I
made in another thread — somewhat relevant to «Doing it yourselves» climatology — Menne et al http://www1.ncdc.noaa.gov/pub/data/ushcn/v2/monthly/menne-etal2010.pdf, following the pioneering work done by Anthony Watts and his surfacestations.org
volunteers, found ``... no evidence that the CONUS average temperature trends are inflated due to poor station siting.»