Heat/cold degree days and Chill hours: Difference between revisions

It allows you to specify, in the units you have selected to use in your implementation of Cumulus, the two thresholds (they do not have to be the same, although they are in the picture that shows the thresholds traditionally used in the UK in the pre-computer age of standard reference look-up tables). Since it introduced electronic processing in the 1960s, the UK Meteorological office has used 22 Celsius for Cold degree days, butand it still usesused 15.5 Celsius for Heat degree days.

* For the period from ''when you installed'' Cumulus version 1.9.2 (this also applies for any earlier days added by 'create missing' with the new version) until day before changing threshold, the integrated figures as stored in [[dayfile.txt]] at the end of the meteorological day are quoted in the report. These counts were integrated on a minute-by-minute basis using the thresholds that existed at the time that the figures were stored in the daily summary log. It is therefore not possible to affect these degree days restrospectivelyretrospectively by changing the thresholds.