Meteo IMGW-PIB custom integration uses data from the IMGW-PIB API (Poland only) to present weather condition in Home Assistant.
You can install this integration manually or via HACS if you add the repository to the custom repository list (three dot menu >> Custom repositories)
To configure integration in Home Assistant, go to Settings >> Devices & services >> Add integration >> Meteo IMGW-PIB or use My Home Assistant link.