Thanks, Gary, for this comprehensive explanation. Based on what you wrote I was now able to plot an entire day.
[image: Bildschirmfoto 2020-06-15 um 11.07.53.png] The trick is quite simple: I just had to define an aggregation for the daily charts. I.e. adding the following two lines to the graphs.conf: aggregate_type = max aggregate_interval = 300 -- 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 on the web visit https://groups.google.com/d/msgid/weewx-user/2cdeaecb-279e-42d4-af61-a1c0038333bbo%40googlegroups.com.