This is the 5843rd most frequent Korean word.
북부의
"북부의" means "northern" in English.
In this sentence, '북부의' describes '날씨', indicating the location context that the weather being discussed pertains to the northern region.
북부의 날씨는 매우 추워요.
The weather in the northern area is very cold.
Here, '북부의 도시들' refers to the cities located in the northern region, qualifying '도시들' as belonging to that area.
북부의 도시들은 역사적인 건축물로 유명해요.
The cities in the northern area are famous for their historical architecture.
In this usage, '북부의 산맥' specifies the mountain ranges situated in the northern section of the area or country under discussion.