Here you go guys!
Sorry for being a bit late.
by creating the koreader directory
I haven't tried this myself since I have only Nook Simple Touch.
However, if I fully understand the logic behind KOreader, OP suggests to put this patch.lua file inside koreader's main folder, so that it will...
Found the workaround here!
Try Gismeteo Lite!
I haven't tried its widget on my Nook since I removed desktop-like launcher. However it states Android 2.0+, so it should work.
If you don't like it, there is a handful of weather widget apps sorted on 4pda forum....
the developer guy haron from the the-ebook.org forum suggests you to change the association 'application/epub+zip' to 'application/epub' and then it should work!