This seems to be browser-specific. This widget was developed on Chrome where the default 3-day plots take a couple seconds to load; anecdotally this is much slower on Firefox. However, even in Chrome certain features are slower than desired. For example, when requesting the last 6 months of data, the humidity plot loads fairly quickly. The AQI and temperature plots take tens of seconds.
This seems to be browser-specific. This widget was developed on Chrome where the default 3-day plots take a couple seconds to load; anecdotally this is much slower on Firefox. However, even in Chrome certain features are slower than desired. For example, when requesting the last 6 months of data, the humidity plot loads fairly quickly. The AQI and temperature plots take tens of seconds.