After a summer of record-smashing heat, warming somehow got even worse in September as Earth set a new mark for how far above normal temperatures were, the European climate agency reported Thursday.

Last month’s average temperature was 0.93 degrees Celsius (1.7 degrees Fahrenheit) above the 1991-2020 average for September. That’s the warmest margin above average for a month in 83 years of records kept by the European Space Agency’s Copernicus Climate Change Service.

“It’s just mind-blowing really,” said Copernicus Director Carlo Buontempo. “Never seen anything like that in any month in our records.”

While July and August had hotter raw temperatures because they are warmer months on the calendar, September had what scientists call the biggest anomaly, or departure from normal. Temperature anomalies are crucial pieces of data in a warming world.