May not be exactly what you’re after, but I documented my use of rrd in this post:-
However, it takes scripting to do this, and your post suggests you’re hoping wdconsole does it for you. wdconsole is really good an *nixy in being a tool that does one thing - collect data from a weather station. We users need to wrap other tools around it to achieve our desired outcomes, just like any good *nix utility. Re-reading that it sounds woefully patronising, for which I’m sorry, but I was actually trying to encourage you, as wdconsole is great used in this way.
Regds
S