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State of the climate: 2025 close behind 2024 as the hottest start to a year

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State of the climate: 2025 close behind 2024 as the hottest start to a year - Carbon Brief

Global temperatures in the first quarter of 2025 were the second warmest on record, extending a remarkable run of exceptional warmth that began in July 2023.

This is despite weak La Niña conditions during the first two months of the year – which typically result in cooler temperatures.

With temperature data for the first three months of the year now available, Carbon Brief finds that 2025 is very likely to be one of the three warmest years on record.

However, it currently remains unlikely that temperatures in 2025 will set a new annual record.

In addition to near-record warmth, the start of 2025 has seen record-low sea ice cover in the Arctic between January and March – and the second-lowest minimum sea ice extent on record for Antarctica.

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