The Southern Hemisphere experienced its warmest April and warmest month on record. The April 2023 temperature surpassed that of the previous record-warm month in the Southern Hemisphere, March 2016, by 0.10°F (0.06°C). April 2023 marks the first month in the Southern Hemisphere where average temperatures exceeded 0.90°C above the 20th-century average. Meanwhile, the Northern Hemisphere had its ninth-warmest April, although ocean-only temperatures in the Northern Hemisphere tied with 2020 as warmest on record for the month.

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Temperatures were above average throughout most of north-eastern North America and Greenland, parts of Central and South America, Africa and Antarctica. In addition, above-average temperatures covered parts of western Europe, eastern and western Asia and Oceania. Sea surface temperatures were above average across much of the northern, western and southwestern Pacific, the central and southern Atlantic and the Indian Ocean. Record warm temperatures covered just over 5% of the world’s surface in April.

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