http://www.ncdc.noaa.gov/ol/climate/research/1998/anomalies/anomalies.html#index Global Long-term Mean Land and Sea Surface Temperatures 7 May 2001 Global Long-term Mean Land and Sea Surface Temperatures Matt Menne March 15, 2000 Global Mean Monthly Surface Temperature Estimates for the Base Period 1880 to 2000 Land Surface Mean Temp. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Annual 1880 to 2000 (°C) 2.7 3.1 4.9 8.1 11.1 13.3 14.3 13.8 12.0 9.3 5.9 3.6 8.5 1880 to 2000 (°F) 36.8 37.6 40.8 46.6 51.9 55.9 57.8 56.9 53.6 48.7 42.6 38.6 47.3 Sea Surface Mean Temp. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Annual 1880 to 2000 (°C) 15.8 15.9 15.9 16.0 16.3 16.4 16.4 16.4 16.2 15.9 15.8 15.7 16.1 1880 to 2000 (°F) 60.5 60.6 60.7 60.9 61.3 61.5 61.5 61.4 61.1 60.7 60.4 60.3 60.9 Combined Mean Surface Temp. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Annual 1880 to 2000 (°C) 12.0 12.2 12.7 13.7 14.8 15.5 15.8 15.6 15.0 14.0 12.9 12.2 13.9 1880 to 2000 (°F) 53.6 53.9 54.9 56.7 58.6 59.9 60.4 60.1 58.9 57.2 55.2 54.0 56.9 EOF