Automatically updating weahter condition input data extracted from wunderground.com?

Hi everybody, i would like to extract some information from this page: http://www.wunderground.com/cgi-bin/findweather/getForecast?hourly=1&query=zmw:00000.1.16101&yday=31&weekday=Sabato

In particular the cloudcover percentage, the air temperature and the wind speed.

Moreover I would like to make a script in which Matlab automatically update the input data everyday.

I was thinking of using the function 'urlread' for reading the information from wunderground. But I have no idea on how to update the infortmation every day.

Do you have some suggestions? Thanks in advance Davide