I am looking for a way to obtain weather data automatically via API. Unfortunately, Google don"t provide the data for Bangkok so I have to find other solution. The next company in mind is Yahoo!. It provides very convenient interface to obtain that data in REST style. For Bangkok, the city code is THXX0002. To see how it looks like, you just try this link http://xml.weather.yahoo.com/forecastrss/THXX0002_c.xml.