When I query about the last hour, the data is not precise (goes up and down only in steps of 1°C) and is using station id LFRN and LFRD.
When I query about the same hour the previous week, the data is precise, and is using station id 07130099999 and such.
It seems new data was available in the meantime, in particular from the station 07130099999. I found data from this station here : https://public.opendatasoft.com/explore/dataset/donnees-synop-essentielles-omm/table/?flg=fr&sort=date&refine.nom=RENNES-ST+JACQUES
The station seems to publish data from the precedent day with a 3 hour interval, but is available on visualcrossing after a few day with a 1 hout interval. Why ? How ? Can we have some insight about the data retrieval process ?