July 2023 was hotter than any other month in the global temperature record, according to scientists at NASAs Goddard Institute for Space Studies (GISS).
This July was 0.24 degrees Celsius warmer than any July in the space agencys record and it was 1.18 degrees Celsius warmer than the average temperature for the month between 1951 and 1980, GISS said.
The data for this analysis comes from thousands of meteorological station and ship and buoy-based instruments. This data was then analyzed using methods that account for the spacing of the temperature station around the globe and for urban heating effects that could bias the calculations. The GISS analysis focused on long-term temperature changes over many decades and centuries.
"This July was not just warmer than any previous July - it was the warmest month in our record, which goes back to 1880. The science is clear this isnt normal. Alarming warming around the world is driven primarily by human-caused greenhouse gas emissions. And that rise in average temperatures is fueling dangerous extreme heat that people are experiencing here at home and worldwide," said GISS Director Gavin Schmidt in a press statement.
Parts of South America, North Africa, North America, and the Antarctic Peninsula were especially hot, experiencing temperatures increases around 7.2 F (4 C) above average. Overall, extreme heat this summer put tens of millions of people under heat warnings and was linked to hundreds of heat-related illnesses and deaths.
The record-breaking July continues a long-term trend of human-driven warming driven primarily by greenhouse gas emissions that has become evident over the past four decades. According to NASA data, the five hottest Julys since 1880 have all happened in the past five years.