b) Search for your hometown, then open "Extended Forecast"
c) Look a the topbar of the browser an you´ll find a adress like that: "http://weather....USNY0176...."
d) Now this is for example the location code that you need: USNY0176
f) Now on iPhone open "/Library/themes/" and then the specific widget folder that you use. For example "EOS2 AnalogClock+Weather". Now open "/Private/WeatherWidget/private/configureMe.js" file with a text Editor ("Editor" for Windows) or freeware "Komodo Edit" for Mac. Override this code "GMX0122" to your location code, save it and copy the file back in it´s folder. You can also directly change the location on your device with "iFile" (Cydia-app).
g) Update interval: It is set to 30 minutes. Change it in the last line of the "configureme.js"-textfile if you want.
h) If you want "Celsius" instead of Fahrenheit look at the picture and write in "true" instead of "false"