Cloudy is a Safari browser extension that displays current temperature on the toolbar. On clicking the button displaying the temperature would display the Yahoo Weather information for the city.
If you want to add your location to Cloudy then first you need get your location code from http://www.edg3.co.uk/snippets/weather-location-codes/. For example if you want get the location code of Chennai then enter the location text box and click the search button. This would display the code for Chennai.
The location code needs to be entered in the Weather Location Code under Cloudy Options in Safari extensions.
Using the Cloudy options, you can also define the unit of temperature that needs to be displayed. Cloudy is neat and simple and it is one of the quick way to check the current weather information of your city.