Sunday Was the Hottest Day Ever Recorded On Earth, Scientists Say

On Sunday, global temperatures reached their highest levels in recorded history (source may be paywalled; alternative source), with a daily average of 17.09 degrees Celsius (62.76 degrees Fahrenheit). “The historic day comes on the heels of 13 straight months of unprecedented temperatures and the hottest year scientists have ever seen,” adds the Washington Post, citing preliminary data from the Copernicus Climate Change Service. Though Sunday was only slightly warmer than the world’s previous hottest day, Copernicus researchers noted, it was extraordinarily hotter than anything that came before. Before July 2023, Earth’s daily average temperature record — set in August 2016 — was 16.8 degrees Celsius (62.24 degrees Fahrenheit). But in the past year, the global has exceeded that old record on 57 days.

Scientists have been tracking global temperatures only for the past few centuries. Yet there is good reason to believe that Sunday was the hottest day on Earth since the start of the last Ice Age more than 100,000 years ago. Research from paleoclimate scientists — who use tree rings, ice cores, lake sediments and other ancient material to understand past environments — suggests that recent heat would have been all but impossible over the last stretch of geologic time. “We are in truly uncharted territory,” Copernicus director Carlo Buontempo said in a statement. “And as the climate keeps warming, we are bound to see records being broken in future months and years. What is truly staggering is how large the difference is between the temperature of the last 13 months and the previous temperature records.”