Use Alfred and Google Weather for local weather.
NOTE: This plugin no longer works and is not maintained since Google killed access to this API.
Just download the extension and double click to install.
Alfred is an amazing app for your Mac that can perform most of your tedius, every-day tasks. In addition, Alfred is extensible and ever-improving, providing a great deal of utility and power to your Mac.
I highly recommend getting the Powerpack, as it provides so many awesome features and can even replace many applications you currently use.
MIT License. See the LICENSE
file.