Simple D8 module that fetches weather data from openweathermap.org.
Please access '/weather' page to see results or click 'Current weather' menu item from the main menu.
Optionally you can pass some arguments like city name and two letter country code like this: /weather/[city_name]/[country_code] (e.g. /weather/Tokyo or /weather/Tokyo/JP). City name is more important than the country code.
Example of module output:
