- May 2014 the hottest May since 1880. Four of the five warmest Mays on record have occurred in the past five years. May 2014 marked the 39th consecutive May and 351st consecutive month (more than 29 years) with a global temperature above the 20th century average. http://www.ncdc.noaa.gov/sotc/global/2014/5 42 comments science
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