• 2023 was 0.60°C warmer than the 1991-2020 average and 1.48°C warmer than the 1850-1900 pre-industrial level
• Almost all days from the beginning of June were the warmest in the ERA5 data record for that particular day of the year.

climate.copernicus.eu/global-climate-highlights-2023

Excerpts: “All these datasets would then place 2023 within the range from 1.4°C to 1.5°C warmer than the 1850-1900 level, assuming an offset of 0.88°C between 1850-1900 and 1991-2020 levels.”