It is Official: July 2019 was hottest month ever recorded

July 2019 is hottest July ever recorded

Back towards the beginning of August, I was writing about the first dataset for July 2019. It strongly suggested that it was the warmest month ever recorded, but that data from C3S was within the margin of error, hence “probably” was the best we could go with. We now have more data from other independently maintained sources.

Both @NOAA & @BerkeleyEarth have confirmed that #July2019 was the #hottestmonth ever recorded.

Hottest July ever recorded, also Hottest Month ever recorded.

The July 2019 global land and ocean surface temperature departure from average was the highest for July since global records began in 1880 at 0.95°C (1.71°F) above the 20th century average. 

The NOAA graphic perhaps best illustrates this.

July Facts

  • This 2019 value surpassed the previous record set in 2016 by 0.03°C (0.05°F).
  • Nine of the 10 warmest Julys have occurred since 2005, with the last five years (2015–2019) ranking among the five warmest on record.
  • July 1998 is the only one from the 20th century to be among the 10 warmest on record.
  • 2019 marked the 43rd consecutive July and the 415th consecutive month with temperatures, at least nominally, above the 20th century average.
  • Julys 2016, 2017, and 2019 are the only instances that had a temperature departure from average at or above 0.90°C (1.62°F).
  • Key Fact: Climatologically, July is the globe’s warmest month of the year. With July 2019 the warmest July on record, at least nominally, this resulted in the warmest month on record for the globe.


What is truly fascinating is that we have had what is the warmest month ever recorded and yet not many people have noticed. This confirmation does not appear to be big news. In the context of Global Warming being the greatest threat our species has ever faced this perhaps underlines our actual priorities.

Meanwhile CO2 continues to increase, so it is inevitable that this latest record will be broken.

Some might indeed not be bothered about the increase in CO2 and simply assert that it will be good for plants. Yes the science denialists really do make that claim, and it has been robustly debunked. It is a fact that CO2 absorbs and emits radiant energy, hence those arguing against the very existence of climate change are not in fact really arguing with either observational reality or the scientific community. Instead their argument is with the laws of physics. Good luck to them on winning that one.


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