If your weather has been broken like mine for a while, I found this post while looking for a solution and per the skins author, "Pul53dr1v3r" on their deviantart page, they posted this new APIKey solution just a few days ago
"New API key for the WEATHER skin (Updated on 16-May-2024): Go to C:\Users\User\Documents\Rainmeter\Skins\RainformerHWi\@Resources, find Variables.inc document, open it, search for "APIKey" variable and replace its value to 71f92ea9dd2f4790b92ea9dd2f779061, save the changesthen refresh the skin or Rainmeter."
"New API key for the WEATHER skin (Updated on 16-May-2024): Go to C:\Users\User\Documents\Rainmeter\Skins\RainformerHWi\@Resources, find Variables.inc document, open it, search for "APIKey" variable and replace its value to 71f92ea9dd2f4790b92ea9dd2f779061, save the changesthen refresh the skin or Rainmeter."
Statistics: Posted by CabanaBanana — Yesterday, 6:50 pm