This is the only available plan that someone like myself could use in an application like Weather Watcher.They describe the plan as follows: Weather Underground also has a paid “enterprise-grade” plan. For what most people are doing with weather data, that should allow a single API key to be shared in several apps (or between several people). Each API key is able to make 1,500 calls per day (with a maximum of 30 calls per minute). If you upload weather data to, you can retrieve your personal API key here. In order to access it, you must obtain an API key by doing one of the following: Over the past year, Weather Underground released a new version of their weather API (the only supported version today). Made other backend changes that are preventing most weather stations from being accessed in their older (discontinued) APIs. The affected weather stations aren’t appearing at either and those issues should be resolvable by the weather station owners.

Made security changes that are preventing some weather stations from uploading data.

Weather Underground recently made changes to their system that:

Weather underground application