UK was hottest ever May also.
The last few years have almost all seen record heat levels.
2016 was the hottest year ever.
2017 was the third hottest year ever.
Global warming deniers finding it hard to deny now walking around in sweaty underpants on their heads all day .
May 2018 ranked as the third-warmest May on record across the world’s land and ocean surfaces, according to the Copernicus Climate Change Service, operated by the European Centre for Medium-range Weather Forecasts