With a population of around 193,000, Hyesan sits in Yanggang-do, KP. The city operates in the Asia/Pyongyang time zone.
In 2025, Hyesan recorded an average annual temperature of 42°F. The hottest temperatures reached 94°F in July; the coolest were -15°F in February. Total precipitation for the year was 37 inches, with the wettest month being August. Snowfall for the year totaled approximately 19 inches.
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