The warmest year on record in the UK was last year.
For the first time in history, the average annual temperature was more than 10 degrees.
The previous all-time high for the 12 months was 9.94C in 2014).
This century has seen 15 of the UK's top 20 warmest years on record.
Mark McCarthy, head of the Met Office National Climate Information Centre, said, "Although an arbitrary number, the UK surpassing an annual average temperature of 10C is a notable moment in our climate history."
Since 1884 all the 10 years that have recorded the highest annual temperature have happened from 2003
The observational record shows that the UK's climate is being impacted by human-caused global warming.
England had the highest average temperature in 2022, followed by Wales, Northern Ireland and Scotland.
According to the Met Office, summers seeing extreme heatwaves are 30 times more likely now than before the Industrial Revolution.
Recent years have seen both higher maximum temperatures and longer warm spells, according to a report.
The trend is predicted to keep going. The UK could see 40C days every three to four years by the year 2200.