December saw a rise in the global average temperature anomaly to 1.27C resulting in a final annual value of 1.13C for the year 2023. This represents an increase of just under 0.3C since 2022, the warmest year so far (as widely reported). My calculation is based on spherical triangulation and uses GHCN corrected land data and the latest HadCRUT3 sea surface temperature data. It is the same basic data as used by all groups (Berkeley, Hadley/CRU, NASA etc.)
Here is the data for the full year 2023
The monthly data shows just how changeable 2023 really was.
Finally here is an animation showing the temperature distribution on the earth’s surface during December 2023
Note the continuing El Nino and very warm temperatures in USA and Canada, while Antarctica remains cooler than normal.