Muan, South Korea

Full City Profile

92,009 Population 546/sq mi density

69 ft Elevation 21 meters

57°F Avg Temperature 14°C

Muan enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 34°F in January while summers reach 77°F in July. The area gets 252 sunny days per year. Annual precipitation totals 46.5 inches. The area receives 1.3 inches of snow annually.

Temperature

34°F Jan (1°C) 77°F Jul (25°C)

Annual Average	56.5°F
	5% above US avg
January Average	34°F (1°C)
July Average	77°F (25°C)
Sunny Days	252 days/yr

Geography

Elevation	69 ft (21 m)
Area	168.5 sq mi (436.4 km²)
Population Density	546/sq mi
Coordinates	34.9901°N, 126.4790°W
Timezone	Asia/Seoul

Precipitation & Snow

Annual Rainfall 46.5"

22% above US avg

Snowfall 1.3"

Wettest Month (Jul) 8.98"

Driest Month (Dec) 1.18"

Air Quality

Earthquake History

1 earthquake (M2.5+) within 150 km since 1990. Strongest: M4.4. Most recent: M4.4 on Jun 11, 2024.

Jun 11, 2024	3 km NW of Puan, South Korea	M4.4	88 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

30 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 3.

Year	Name	Category	Closest
2022	Hinnamnor	Category 2	172 km
2020	Bavi	Category 3	189 km
2020	Haishen	Category 2	254 km
2020	Maysak	Category 2	188 km
2019	Lingling	Category 2	148 km
2018	Kong-rey	Category 1	244 km
2018	Soulik	Category 1	229 km
2018	Prapiroon	Category 1	283 km
2016	Chaba	Category 2	162 km
2013	Danas	Category 1	235 km
2012	Sanba	Category 2	157 km
2012	Bolaven	Category 1	251 km
2010	Kompasu	Category 3	151 km
2007	Nari	Category 2	100 km
2004	Megi	Category 1	243 km
2003	Maemi	Category 3	166 km
2003	Soudelor	Category 1	259 km
2002	Rusa	Category 1	122 km
2000	Saomai	Category 1	185 km
2000	Prapiroon	Category 1	219 km

Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

1 tsunami recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1649	YELLOW SEA	Earthquake	—	—	72 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

1 volcano within 200 km. Closest: Halla (181 km).

Name	Type	Elevation	Last Eruption	Distance
Halla	Shield	1,919 m (6,296 ft)	1007	181 km

Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	34°F (1°C)	1.3 in	Coldest
February	37°F (3°C)	1.8 in
March	44°F (7°C)	2.4 in
April	54°F (12°C)	3.4 in
May	63°F (17°C)	3.6 in
June	71°F (21°C)	6.8 in
July	77°F (25°C)	9.0 in	Wettest
August	79°F (26°C)	7.7 in	Warmest
September	71°F (22°C)	5.4 in
October	61°F (16°C)	2.1 in
November	49°F (10°C)	2.0 in
December	39°F (4°C)	1.2 in	Driest

Muan has a seasonal temperature swing of 45°F / from 34°F in January to 79°F in August. Total annual precipitation is 46.5 inches, with July being the wettest month (9.0") and December the driest (1.2").

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