Summer 2024 was the hottest in the northern hemisphere since records began, the European Union’s climate change service Copernicus said on Friday. The global-average temperature for boreal summer (June to August) 2024 was the highest on record at 0.69 degrees Celsius above the 1991 to 2020 average for those three months, according to Copernicus data. “During the past three months of 2024, the globe has experienced the hottest June and August, the hottest day on record, and the hottest boreal summer on record,” deputy director Samantha Burgess said. “This string of record temperatures is increa…