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New record daily global average temperature reached in July 2024 [1]

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Date: 2024-07

The Earth has just experienced its warmest day in recent history, according to the Copernicus Climate Change Service (C3S) data. On 21 July 2024, the daily global average temperature reached a new record high* in the ERA5 dataset**, at 17.09°C, slightly exceeding the previous record of 17.08°C from 6 July 2023.

Based on preliminary data released by C3S on 23 July, Sunday 21 July was the hottest day since at least 1940, by a small margin of 0.01ºC. While it is almost indistinguishable from the previous record, what really stands out is the difference between the temperatures since July 2023 and all previous years. The data can be explored in Climate Pulse, the C3S application that provides historical and near real-time temperature data from the ERA5 reanalysis dataset.

Daily global average surface air temperature for 2024 (red), 2023 (orange), and all years between 1940 and 2022 (grey). Data for 21 July 2024 is preliminary. Data source: ERA5, via Climate Pulse. Credit: C3S/ECMWF

Before July 2023, the previous daily global average temperature record was 16.8°C, on 13 August 2016. Since 3 July 2023 there have been 57 days that have exceeded that previous record, distributed between July and August 2023, and during June and July so far in 2024.

According to C3S Director Carlo Buontempo: "On July 21st, C3S recorded a new record for the daily global mean temperature. What is truly staggering is how large the difference is between the temperature of the last 13 months and the previous temperature records. 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."

Analysis of the years with the highest annual maximum daily global temperatures shows that both 2023 and 2024 have seen annual highs substantially above those recorded in previous years.

Another sign of the global warming trend is the fact that the ten years with the highest daily average temperatures are the last ten years, from 2015 to 2024.

The difference in the highest daily average temperature between the lowest ranked of those ten 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 is (see the chart below).

Annual maximum daily global average temperatures in the ERA5 record for the past 50 years (1974 to 2024). The ten highest annual maximum temperatures are highlighted in dark red. Data for 21 July 2024 is preliminary, and data for 2024 is available up to 21 July 2024. Data source: ERA5. Credit: C3S/ECMWF.

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[1] Url: https://climate.copernicus.eu/new-record-daily-global-average-temperature-reached-july-2024

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