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Third-hottest June puts 2017 on track to make hat-trick of hottest years

Monthly temperature anomalies compared with the 1980-2015 mean, according to Nasa’s GISTEMP data set from 1880 until June 2017. Photograph: Nasa
Michael Slezak, The Guardian, Jul 20 2017 - 10:45

June 2017 was beaten only by June in 2015 and 2016, leaving experts with little hope for limiting warming to 1.5C or even 2C

Last month was the third-hottest June on record globally, temperature data suggest, confirming 2017 will almost certainly make a hat-trick of annual climate records, with 2015, 2016 and 2017 being the three hottest years since records began.

The figures also cement estimations that warming is now at levels not seen for 115,000 years, and leave some experts with little hope for limiting warming to 1.5C or even 2C.

According to new figures from the US National Oceanic and Atmospheric Administration (Noaa), June 2017 was the third-hottest June on record, beaten only by the two preceding Junes in 2015 and 2016.

The Noaa data show combined land and sea-surface temperatures for June 2017 were 0.82C above the 20th century average, making a string of 41 consecutive Junes above that average.

June 2016 still holds the record at 0.92C above the 20th century average, followed by June 2015 which was 0.89C above the baseline.

The data line up closely with Nasa figures released last week, which are calculated slightly differently, finding the month was the fourth-hottest on record – with June 1998 also being warmer in their data set.

Based on the Nasa data, climate scientist and director of Nasa’s Goddard Institute for Space Studies Gavin Schmidt estimated that 2017 was probably going to be the second-warmest year on record after 2016, but would almost certainly be among the top three hottest years.