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The following is a list of weather events that occurred on Earth in the year 2023. The year saw a transition from La Niña to El Niño, with record high global average surface temperatures. The several weather events which had a significant impact were blizzards, cold waves, droughts, heat waves, wildfires, floods, tornadoes, and tropical cyclones.
Projected global surface temperature changes relative to 1850–1900, based on CMIP6 multi-model mean changes. The IPCC Sixth Assessment Report defines global mean surface temperature (GMST) as the "estimated global average of near-surface air temperatures over land and sea ice, and sea surface temperature (SST) over ice-free ocean regions, with changes normally expressed as departures from a ...
In May the global average temperature was 1.52 degrees Celsius above the pre-industrial average, marking the 11th consecutive month where the global average temperature was at least 1.5 degrees ...
2023's June-July-August season was the warmest on record globally by a large margin, as El Niño conditions continued to develop. [16] September 2023 was the warmest September on record globally, with an average surface air temperature 0.5 °C above the temperature of the previous warmest September (2020). [17]
The temperature on land rose by 1.59 °C while over the ocean it rose by 0.88 °C. [3] In 2020 the temperature was 1.2 °C above the pre-industrial era. [4] In September 2023 the temperature was 1.75 °C above pre-industrial level and during the entire year of 2023 is expected to be 1.4 °C above it. [5]
The global average covers 97-98% of Earth's surface, excluding only latitudes above +85 degrees, below -85 degrees and, in the cases of TLT and TMT, some areas with land above 1500 m altitude. The hemispheric averages are over the northern and southern hemispheres 0 to +/-85 degrees. The gridded data provide an almost global temperature map. [3]
NOAA pegged 2024’s global average surface temperature at 1.46 degrees C above its preindustrial baseline, and NASA’s measurements put the increase at 1.47 degrees C.
From January to September, the global mean temperature was 1.40 °C higher than the pre-industrial average (1850–1900). [18] January 2023 was the seventh warmest on record – 0.25 °C warmer than the normal but 0.33 °C cooler than January 2020. [19] In July, the global average temperature was 17.32 °C (63.17 °F). [20]