Last month was the hottest May on record ... again

Last month was officially the hottest May on record, according to the National Oceanic and Atmospheric Administration.

NOAA tracked temperatures 1.57 degrees Fahrenheit above the worldwide average of 58.6 degrees.

The data indicates 2015 is on pace to be the hottest year on record, with temperatures in the first five months in the surpassing the same period in 2010 as the warmest first five months.

NOAA scientists claim the heat is thanks at least in part to El Nino. The cyclical warming of the eastern Pacific Ocean can lead to what we're seeing now: record temperatures and record rainfall.

Not only did May mark the warmest spring and the warmest first five months of the year ever recorded worldwide, but in the United States, it was also the single wettest month ever.

May set the same record in 2012, and a new one in 2014. Both years set new records for the hottest in modern history.

According to UN data, 14 of the 15 hottest years on record have all come in the 21st century, and the heating trend is expected to continue.