Another awkward headline for global warming deniers.
Heat Wave Nudged the Planet to Its Hottest June, European Forecasters Say
Oh my goodness. Even if I weren't well read on this issue, my critical thinking skills alone would force me to see a number of logical problems with the article you cite.
Now, just FYI, 2018 in the U.S. was the 13th coldest year in 124 years, and the coldest since 1997. November 2018's record snow cover extent alone was roughly 1.4 million square miles above the average from 1981 through 2010.
You really should check out some opposing research on this issue.