"December 2023 [...] with an average surface air temperature of 13.51°C ..." - https://climate.copernicus.eu/surface-air-temperature-december-2023

This question resolves YES if Copernicus publishes an average surface air temperature for December 2024 which is 13.52 C or higher. No consideration of further decimal places will be considered.

I'm not sure when the report will be published on their website, so I'll set the close date to one week after the first day of January 2025.