There's a dearth of information on Growing Degree Days (GDD) for weewx. Hopefully someone out there has done it.
I see the [StdReport] [[Units]] [[[Groups]]] > 'group_degree_day', of which 'growdeg' is a member. https://weewx.com/docs/5.1/reference/units/?h=growdeg And I see [StdReport] [[Units]] [[[DegreeDays]]] > 'growing_base = 50.0, degree_F' https://weewx.com/docs/5.1/reference/skin-options/units/?h=grow#growing_base And that's about it in terms of references to GDD. GDD is a pretty simple calculation, done either with the average of (daily High and daily Low) or the mean daily temperature, minus the base temperature of 32F/0C for cool season zones or 50F/10C for warm season zones. There's an If/Else logic required to handle GDD that would be negative, where IF(((HiF + LoF)/2)-50F) < 0, GDD = 0, ELSE GDD = ((HiF + LoF)/2)-50F) [ or alternately, just $day.outTemp.avg - growing_base ] Within weewx, I can find $day.outTemp.avg, but how would I pull out GDD for use in any of my templates? Is 'growdeg' available as a software-derived observation and I'm just overlooking it, or is it something I have to make in say, [[StdCalibrate]] > [[[Corrections]]] ? -- 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/5a34db2d-0886-452f-a36b-9324ff0b26fbn%40googlegroups.com.
