I believe jkUtils uses OpenWeatherMap for its data source. Perhaps you can use that as a base if you haven't already progressed too far. From memory, I used jkUtils weather app until they started requiring an API key. Since I already went through the effort of getting one for WU, I just switched back. I can also upload my weather data to WU since it's linked to my weather station, so it makes sense for me to use that one.