To reproduce, search for "className: 'WeatherIcon'" in the site JS, set a breakpoint, and then run ye.map((o, i) => [i, {...o, icon: o.icon.type.displayName}]))
(making sure to replace "ye" with whatever the weathers array is called in the new code, it should be right above the WeatherIcon component).
Icon names correspond exactly with component names from https://react-icons.github.io/react-icons/, specifically from the GameIcons and WeatherIcons sub-packages.