September 2012 has tied September of 2005 for warmest September on record globally, according to the National Climatic Data Center (NCDC).
Land/ocean combined temperatures for September 2012 averaged 0.67 C or 1.21 F above the 20th century average. Official records go back to 1880.
The NCDC image below shows the September 2012 temperature anomalies.
The NCDC image below shows the September 2012 land/ocean percentiles, which gives you a better historical perspective.
Also, the September NCDC report indicated that so far, 2012 is running 8th warmest and still on track for the warmest La Nina year on record.
The Goddard Institute for Space Studies (GISS), which uses slightly different methods than the NCDC to come up with their temperature data, show that September 2012 was the 4th warmest September on record, coming in just behind 2005, 2010 and 2003.
The average global land/ocean temperature anomaly for September 2012 was +0.60 C, according to NASA GISS.
September 2012 was also tied for second warmest September in the northern Hemisphere.
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