To get weather information, it's needed the city code.
Code formats:
You can get the city code from this website: http://www.edg3.co.uk/snippets/weather-location-codes/ . Enter the city name and press "Search" and you will get a list with a possible values, make sure you choose the correct code from your city and country.
Info: If you can't find your city code, choose another from nearby cities.