This year’s May is the planet’s warmest May since record keeping initiated in 1880. This is according to NOAA’s National Centres for Environmental Information (NCEI) and NASA. National Oceanic and Atmospheric Administration (NOAA) rates May as tied with 2016 for warmest on record, while NASA put May 2020 ahead of May 2016. This sort of minor differences often occur between NOAA and NASA due to differences in methodology.

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