The weather-programs I mentioned create 4 clientraw files often to be used in WD-Live or Mesonets. So if is is identical enough for WD-Live it is probably OK for the graphs also.
Example Gauges and your graphs for
Meteohub => http://www.weerstation-parkstad.nl/weather2/index.php?p=gaugePage&lang=nl
consoleWD => http://kb9cfv.net/weather/weather27/index.php?p=17&lang=en#data-area
WSWIN => http://www.cux-wetter.de/weather28/?p=gaugePage
[s]WVIEW => http://www.kids4all.nl/weather28/index.php?p=gaugePage&lang=nl#data-area[/s]
There are maybe more weatherprograms generating clientraw files
Wim