UnderTheWX 2.6 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. UnderTheWX for Mac is included in Lifestyle Tools. This free software for Mac OS X is an intellectual property of GetWare.
From the developer:
UnderTheWX reads weather data off the popular AcuRite USB Professional Weather Centers and uploads it to Weather Underground, Weathercloud, PWSWeather, WOW and CWOP.
If you do not own an AcuRite station, you can use this App to display the weather from any WUnderground station as long as you are a WUnderground contributor.
You may want to check out more Mac applications, such as Outside - Weather Reports and Forecasts, Virtual Villagers - The Secret City or multiWeather, which might be similar to UnderTheWX.