Seonghwan, in Chungcheongnam-do, South Korea, is home to roughly 29,200 people in the Korea Standard Time zone at 36.9°N latitude.
In 2025, Seonghwan recorded an average annual temperature of 56°F. The hottest temperatures reached 97°F in July; the coolest were 10°F in January. Total precipitation for the year was 51 inches, with the wettest month being September. Snowfall for the year totaled approximately 6 inches.
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