There really should be a conclusive Javascript weather library. Weather.js fetches data from openweathermap.org (no affiliation) and makes querying all kinds of weather related information easy. Since other providers format their output differently, currently this is the only source provider.
Weather.js is still in early development so expect changes and please contribute! Among the features I hope to incorporate:
Weather.js works in the browser and node.js. Take your pick. For the browser, download the most recent version on github. For use in node, do the install thing.
npm install -g weather.js
Important! In the browser you will need to also include Sugar.js and jQuery. I will try to remove these dependancies as soon as possible.
At the moment you can access the current weather conditions and the forecast for any city. By default it will use the closest match as returned by Open Weather Map.
Weather.getCurrent("Kansas City", function(current) {
console.log(
["currently:",current.temperature(),"and",current.conditions()].join(" ")
);
});
Weather.getForecast("Kansas City", function(forecast) {
console.log("forecast high: " + forecast.high());
console.log("forecast low: " + forecast.low());
});