I have searched, but I seem not to be able to find a weather gadget for Win 7... Are there still any around? Sadly, the best one is the one from Win 11, but everybody says it is impossible to install on 7.
Modern Apps using the UWP framework cannot be executed on Windows 7, the OS lacks the whole infrastructure for that type of App. Enabling the Windows Gadget Platform (which has a Weather Gadget IIRC) is the closest you can get (without thrid-party applications).