...
Note, that in addition, such parameters may, or may not, be averaged in time. For example, they might be averaged over a month from hourly data, in which case they would be archived in a monthly mean "stream". This would be indicated in other metadata in the GRIB header of the data, as would details of the averaging frequency and period.
Some forecast parameters are not valid at the specified time, but over a processing period. During this period, the parameter could be accumulated, averaged or the minimum/maximum could be calculated, from the values at all the model time steps during the processing period. For more information, see ERA5 terminology: analysis and forecast; time and steps; instantaneous and accumulated and mean rates and min/max parameters
Related articles
Content by Label showLabels false max 5 spaces CKB showSpace false sort modified reverse true type page cql label in ("era5","era-interim") and type = "page" and space = "CKB" labels era5