ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/daily a bit of a mess, but so is “raw” food 
If you prefer your data in graphs, try:
http://climexp.knmi.nl/ Go prepared with latitude & longitude coordinates, to find the temperature station of interest. Raw and adjusted data are available, here.
http://data.giss.nasa.gov/gistemp/station_data/ These are adjusted temperatures.
http://www7.ncdc.noaa.gov/IPS/coop/coop.html PDFs of original paper records.
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