January 2024 was the warmest January on record in the JRA-55 dataset, at 1.56C above preindustrial levels.

It beat out the prior 2016 record (during the super El Nino that year) by around 0.06C, and was 0.42C warmer than January 2023. pic.twitter.com/p2c3RXhMEy

— Zeke Hausfather (@hausfath) February 3, 2024