Weathered
Sometimes, a new product is so clearly superior that, as soon as you see it, you stop using anything else.
For weather, that’s the case with [Forecast.io](http://forecast.io).
Like hiring [Nate Silver](http://en.wikipedia.org/wiki/Nate_Silver) as your meteorologist, it collects weather data from a slew of sources, then aggregates it statistically to generate the most accurate, current, local forecast possible. You may know the developers – and the accuracy of their data – from the Dark Skies iPhone app, which can uncannily alert you it’s about to start raining a few minutes before it does.
Combine that data with a clear, user-friendly front end, and you’ve got an easy winner.
*[Nota bene: head to [the same http://forecast.io URL](http://forecast.io) from your iPhone’s browser, and you can install the site as an app, too. Like the desktop version, it will instantly supplant whatever else you’re using now.]*