Sunday Was Earth's Hottest Day on Record

Olivia Rosane

July 23, 2024

July 21 was Earth's hottest day on record, overtaking the record set last July during the hottest year in millennia.

  

Citizens are cooling off in a bomb shelter as the high temperature continues in Chongqing, China, on July 21, 2024.(Photo: Costfoto/NurPhoto via Getty Images)

 The European Copernicus Climate Change Service (C3S) found that Sunday's average air surface temperature soared to 17.09°C , or 62.76°F, according to preliminary data. While that is only 0.1°C warmer than the previous record—set on July 6, 2023—it was nearly 3°C higher than the pre-2023 record, set at 16.8°C on August 13, 2016.

"What is truly staggering is how large the difference is between the temperature of the last 13 months and the previous temperature records," C3S Director Carlo Buontempo said in a statement. "We are now in truly uncharted territory and as the climate keeps warming, we are bound to see new records being broken in future months and years."

The news follows a year of shattered temperature records as El Niño combined with the climate emergency to heat air and ocean to levels well above average. While El Niño conditions ended in April, scientists still predict that 2024 could overtake 2023 as the hottest year on record.

As of June 2024, the past 13 months have all been the hottest of their kind on record. June 2024 was also the 12th month in a row to see its average temperature meet or surpass 1.5°C above preindustrial levels—the most ambitious temperature goal enshrined in the Paris agreement.

Scientists have warned that the only way to keep global temperatures from rising further is to rapidly phase out the use of oil, gas, and coal and transition to renewable energy.

Before Sunday, the last hottest day on record was July 6, 2023, which was also the fourth consecutive day to break that record. The previous record was set at 17.08°C, or 62.74°F, according to Copernicus. However, since the 2016 temperature record was first broken on July 3, 2023, 57 days in the past year have also surpassed it.

What's more, C3S found that the last 10 years have been the 10 years on record with the highest average daily temperatures.

"The difference in the highest daily average temperature between the lowest ranked of those 10 years (2015) and the previous record before 2023 (13 August 2016) was 0.2°C. The jump from the 2016 record to 2023/2024 is about 0.3°C, highlighting how substantial the warmth of 2023 and 2024," C3S said.

Record-breaking temperatures have also brought extreme weather.

On Sunday, Florida meteorologist Jeff Berardelli wrote on social media that "the most anomalously warm places were Antarctica and Western Canada where several hundred wildfires blaze, many out of control."

C3S also said that Sunday's record was in part driven by "much-above-average temperatures over large parts of Antarctica."

The warmest day on record also coincided with heatwaves in Russia, Europe, and the U.S., Reutersreported.

C3S predicted that temperatures would continue to rise in the short term.

"In the coming days, we are expecting the daily global average temperature to further increase and peak around 22 or 23 July 2024 and then go down, but with possible further fluctuations in the coming weeks," the agency said.

In the longer term, temperature trends will depend on whether policymakers can take ambitious action to reduce greenhouse gas emissions and halt the destruction of natural carbon sinks.