Open a Shell in GeekTool
Place Copy and Paste Code to Command box
curl -s 'http://thefuckingweather.com/?zipcode=YOURZIPCODE' | grep '"content\|"remark\|span' | sed 's/<[^>]*>//g' | sed 's/°/°/'
Feed from thef******weather.com.
Put your zipcode in the YOURZIPCODE or you can go to the actual website search your city and put the URL in place of the one here.
[Admin Note: I've also made a .glet file with the script embedded in it which you can download using the link below.]