This is the 9791st most frequent Russian word.
южно
"Южно" means "southern" or "southward" in English.
Here, 'южной' (southern) describes the location, emphasizing geographical positioning.
Этот город расположен к южной части страны.
This city is located in the southern part of the country.
In this sentence, 'южно' (southernly) modifies 'тёплая' (warm), suggesting warmth typical of southern climates.
Погода здесь южно тёплая.
The weather here is warmly southern.
The usage of 'южных' (southern) relates to cultural or regional traditions specific to the south.