Given that we desperately want to avoid rising above that global average temperature to avoid climate catastrophe for millions - if not billions - of people, now is the time to take climate action seriously, and begin the rapid transition of the global economy over to a low-carbon one, that relies on green, renewable energy.
The other four in the top 5 have all been in the last five years.
Global surface temperatures have risen by about 2 degrees Fahrenheit since 1880.
CNN notes that the past three years have each set a record for the number of natural disasters hitting the U.S. that caused more than $1 billion in damage.
The 20 warmest years in history all occurred within the last 22 years.More news: Hotel booking sites agree to end ‘misleading’ sales tactics
Rowan Sutton, director of science for the National Centre for Atmospheric Science (NCAS) said that will likely mean more heat records in the years to come.
Changes in Arctic temperatures also contribute to an increase in extreme weather events as the jet stream, a circular current of air around the Arctic that is responsible for weather patterns in the Northern Hemisphere, gets disrupted.
"That is not saying the Paris Agreement is done for. but it's a worrying sign", he added.More news: Nine Huskies, Three Cougars Among List Of 2019 NFL Scouting Combine Participants
The obvious long-term trend of steady warming makes it easier to more accurately predict near future warming, NASA chief climate scientist Gavin Schmidt said. The Paris pact responded to a 1992 United Nations treaty under which all governments agreed to avert "dangerous" man-made climate change.
NBC reported that the polar regions experienced the strongest warm trends, resulting in the melting and shrinkage of ice sheets in Greenland and Antarctica, as well as the continued loss of sea ice in the Arctic.
He did not mention climate change in his State of the Union speech on Tuesday.
Patrick Verkooijen, head of the Global Center on Adaptation in the Netherlands, said that the WMO report showed "climate change is not a distant phenomenon but is here right now".More news: Supreme Court allows execution of Muslim inmate in Alabama to go ahead