Other stuff you will need:

• A web server
• curl
• gnuplot
• Some fonts for gnuplot, e.g. msttcorefonts (GDFONTPATH=/usr/share/fonts/truetype/msttcorefonts)
• xmlstarlet
• A WeatherUnderground API key. Put the value in "apikey" file in same directory. Probably won't want to checkk it in though.

./makepage.sh creates the files that weather.html needs, e.g. data.json and bar.png. I run that every five minutes from a CRON job.