what would be easy to set up is a db chart of location, current temperature, date & time, clever remarks id
Then when the user lands on the page, a background query of that location’s date&time compare, then if it is within a certain amount of time since the last query of the temperature it displays the data you want on that chart line, if not, query the parse rss feed and update the temperature and the stored comments for the current weather, which would work well on a separate db table (like a remarks table with a unique column id) from the weather db table, a compare db table can be generated per location over time, and of course the remarks from another db chart.
Parsing data from a free xml/rss feed might be a better way of doing above instead of a web API.
