File:The Earth's temperature compared to local variation of 30-100 F.jpg

Chart created by me from ncdc data

http://www.ncdc.noaa.gov/gcag/GCAGts?mon1=1&bye1=1880&eye1=2005&graph=Lineplot&TS=6&nzi=99&dat=BLEND&sbeX=-180.0&sbeY=90.0&senX=180.0&senY=-90.0&dum=0.9830630057209834#HERE