I happened to see here that 7 years ago someone used wview and RRDTool in the same sentence. Here is how I applied this idea five years ago:
The RRD files are auto-updated just after the HTML updates. Then the CGI dynamically renders any time frame of all data on-the-fly from the RRD files. Options exist to zoom/scroll time, add extra sensors, make graphs bigger and so on.
Since weewx is the same database format, this should work there too. I haven't tried it yet since I don't yet have weewx.