Kosan is a city of approximately 24,800 people in Kangwon-do, KP. Located in the Asia/Pyongyang time zone at 38.9°N latitude.
In 2025, Kosan averaged an annual temperature of 52°F, with hottest temperatures reaching 96°F in July and lowest around -2°F in December. The city received approximately 41 inches of precipitation during the year.
View historical weather for Kosan · More cities in Kangwon-do