Averages
The graph view calculates hourly, daily, weekly and monthly averages of any feed, such as power, temperature or humidity. Daily, weekly and monthly periods follow your timezone.
Each value is the mean from its timestamp to the next. The timestamp marks the start of the period.
Hourly averages
Open the feed in the graph view.
Set Type to Fixed Interval and set the interval to 3600 seconds.
In Feed Config, tick Average.
Daily averages
Open the feed in the graph view.
Set Type to Daily.
In Feed Config, tick Average and set Type to Bars.

Averages are calculated in the background on first request. If the graph is empty, click Refresh after a few seconds.
To export the averages, see Export CSV.