Another day another WebRemote tutorial showing how to get a live weather report onto your XTension Web based remote control page. WeatherMan is an excellent program available for $.99 from the Mac App Store and has a great scripting dictionary.
The scripts also show how to parse out the forecasted high and low temperatures for each day and the chance of precipitation. Those are all placed in XTension pseudo units and you can either just display the data or use it for other calculations like running your sprinklers or not.
WeatherMan and XTension