The Download Now link will prompt a local download of the Google Chrome extension. To install the extension directly, open the file using your Chrome browser.
From wetter.com AG:
The Weather by weather24.com is a Google Chrome Extension. You can get weather information quickly and easily. Using the map you can access the forecast for major cities in Europe. A search using a name gives you access to the prediction of any location in Europe or in the world.
In the settings you can choose your preferred location.
