NASA: May 2017 the 2nd warmest May in 137 years of modern record-keeping
MILWAUKEE — NASA officials say May 2017 was the second-warmest May on record.
NASA’s Goddard Institute for Space Studies says May of 2017 was the second-warmest in 137 years of modern record-keeping.
Only May 2016 was hotter.
May of 2017 was just a fraction of a degree higher than the third-warmest May, which happened in 2014.
The temperature average is determined by data from more than 6,000 weather stations and other instruments around the world.
Critics have suggested warmer-than-normal temperatures are a sign of climate change.