The following 2 new Monthly sub-datasets have been added under the "CERA-SAT" dataset

Synoptic Monthly Means

http://apps.ecmwf.int/datasets/data/cera-sat-edmm

Monthly Means of Daily Means

http://apps.ecmwf.int/datasets/data/cera-sat-edmo

Documentationhttps://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/cera-sat