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August 2017 was the second warmest August in 137 years of modern record-keeping

August 2017 was the second warmest August in 137 years of modern record-keeping, according to a monthly analysis of global temperatures ...


August 2017 was the second warmest August in 137 years of modern record-keeping, according to a monthly analysis of global temperatures by scientists at NASA's Goddard Institute for Space Studies (GISS) in New York.

The measured value is consistent with the trend in global average surface temperatures that has been observed during the past few decades. Last month was +0.85 degrees Celsius warmer than the mean August temperature from 1951-1980.

It was surpassed by August 2016, which was still affected by the 2015-2016 El Niño and was 0.99 degrees Celsius warmer than normal. However, August 2017 was about +0.2 degrees warmer than the August following the last large El Niño event in 1997-1998.

The monthly analysis by the GISS team is assembled from publicly available data acquired by about 6,300 meteorological stations around the world, ship- and buoy-based instruments measuring sea surface temperature, and Antarctic research stations.

The modern global temperature record begins around 1880 because previous observations didn't cover enough of the planet. Monthly analyses are sometimes updated when additional data becomes available, and the results are subject to change.

For more information on NASA GISS's monthly temperature analysis, visit: data.giss.nasa.gov/gistemp.

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