Want climate news in your inbox? Sign up here for Climate Fwd:, our email newsletter.

Analyses by other agencies, including NASA and the National Oceanic and Atmospheric Administration in the United States, will be released over the next several weeks and could be slightly different.

But whatever its ultimate ranking, last month is part of a long-term trend: As human-related emissions of greenhouse gases have continued, the atmosphere has continued to warm. The past five years have been the hottest on record, including the record single year in 2016. The 10 hottest years have all occurred in the past two decades.

This June was the warmest on record, and the previous five months were among the four warmest for their respective months, the climate researchers said. That puts this year on track to be in the top five, or perhaps the hottest ever.