Do we have options for making line graphs with ArcGIS Online. I've the wheather stations for which I'm supposed to show data using time interval.
Sure you can add a line chart to the popup of a feature: Configure pop-ups—ArcGIS Online Help | ArcGIS
This document might be helpful (although old):
http://storymaps.esri.com/downloads/DesigningWebMapPopups.pdf
