October Global Temperature Update

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Additional figures are on our global temperature web page.

 

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Globally October 2017 was the second warmest October since reliable measurements began in 1880, 0.90C warmer than the 1951-1980 mean.  October temperature was +1.18C relative to the 1880-1920 base period, which provides our best estimate of pre-industrial global temperature.  The warmest October was 2015 at +1.08C relative to the 1951-1980 mean.  2016 was the 3rd warmest at +0.89C.  The 2017 January to October 10-month mean is second highest, behind 2016, compared to the first 10 months of other years.

Although a weak La Nina is present, the global mean temperature in October stayed relatively high; polar regions were especially warm.  2017 will likely to be the second warmest year in the record.