Hi Gary,
Thanks, that got it in one!
I changed the aggregate_type from avg to max for all plots except daily. Deleted all the png images and forced weewx to regenerate all images with wee_reports
So, one more for you if I may...
In the default daily Seasons page, in the left frame there is High/Low section and underneath is the high & low for the various events e.g. Outside Temperature with the high and low temp.
In the old Standard skin, it also reported WHEN those observations occurred - is it possible to add the time for each event i.e. 11.5C at 11:46 ??
Hope everything is OK with you down under and you are safe from the fires.
Nigel (in a wet and miserable south west UK)