In Hong Kong, weather data is not ready for open, only 7 RSS feeds of latest news/updates from different weather reports are available on Data.One. which I presented at BarCamp HK 2013, and announced my open source project hk0weather to be an interim solution of Hong Kong Open Weather Data.
hk0weather provides few open source web scrapers and parsers to scrape Hong Kong Observatory web pages, and parse data into useful machine readable data format.
Last week, I made parsed weather data stored to Django, so we can read data on Django web admin. And Hong Kong rainfall data is added to hk0weather early this week.
You are welcome to contact with me to look at demonstrations and develop your own front-end to use data produced by my software.