My guess is that 300k pvs mostly follow daylight probably on North America only. So you probably have peaks around 21-23 and almost nothing between 01-08am.
And of course, if you write it in C these numbers look awful, but I'd say for run-of-the-mill django they are quite good. I'm willing to bet most django sites you find on heroku free tier don't handle this kind of pressure.
Even being as generous as I can imagine, that’s still each request consuming over 200ms of system resources, which for something like this would be terrible. It’s some years since I’ve done any Django, but I remember measuring a fairly simple django CMS installation (which is waaaay more complex than this) in 2013 taking 50–80ms to serve most pages, with the slowest page averaging something like 180ms; my recollection is that I took those measurements before doing any deliberate performance tuning (I don’t think I’d put the cached template loader in yet—it wasn’t in the default config back then—and I think it may have even not been doing connection pooling).
Given the scope of this app, I figure it should be doing one or two simple and well-indexed SELECT queries only, and maybe an INSERT or UPDATE for analytics, but nothing more with its database. I would think 20ms should be oodles of time to do everything even in Django.