Write some Software

I need to set up a simple weather forecast server. The basic functionality is: for a given coordinate you need to do a query to several free weather forecast services (e.g. OpenWeatherMap) and return a combination (defined later) of them. The query answers are typically provided in XML format. Furthermore, there should be a simple GIS interface for the administrator, which could define polygons with certain (time-limited) properties; if the query coordinate is within the polygon, special rules apply. The preferred language for the server is java. It should run on free or low-budget hosting (like AmazonCloud or similar). All the credentials and source code have to be transferred to me. An additional plus is if you could provide some web-scraping methods, for data which are published on the web in the form of charts and similar, but not in tables or XML responses.