Get Any Weather Information With jQuery: simpleWeather
simpleWeather is a jQuery plugin for fetching any weather-related data from Yahoo! Weather.
It makes use of the YQL API and can bring weather details of any location by mentioning their name (or zip code – US only).
The data returned includes current/max temperature (in fahrenheit or celcius), humidity, pressure, visibility, wind speed/direction and the weather condition image. There is also support for the forecast of the next day.
Weather condition images are provided by Yahoo! but custom ones can be used too (Free Weather Icons Collection).