Heating and cooling degree base temps are set in the respective skin.conf under [Units] [[DegreeDays]] using options heating_base and cooling_base (have a look in the Standard skin.conf). If omitted the default of 65F is used.
As for plotting the data, the number 1 rule for the weeWX plot engine is "it can only be plotted if it's stored in the archive". Heating and cooling degree days are not in the default weeWX schema nor are they calculated for each archive/loop period. Rather they are calculated as an aggregate over some period, eg $month.heatdeg.sum, for use in a cheetah generated report. I am sure heating and cooling degree days could be archived so that weeWX can plot them but there will be a bit of coding involved. I know little of the life cycle of the cydia pomonella, but I suspect the NOAA format monthly report (with an adjusted base temp if required) may be the simplest approach to get the info you are after. A customised report could be produced that generates a running total, the report for the current month is updated each report cycle so it would be very close to being current (within an archive period) if that matters. If a more funky weeWX generated plot is required then I suspect there will be some significant work required. Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
