I see this ad-on has a lot of users and I've also been using it for more than 3 years. It works well and is well designed but what people might be missing is that their free API is very wrong most of the times. At least in my area the forecasts are completely unreliable. A simple hourly check with popular weather sites will almost always show contradicting results as far as rain probability (for example) with this add-on's API being the one that's wrong. Developers should find a way to scrape popular weather websites and use that info to display the prognosis.