Ganghwa-gun, South Korea

Full City Profile

25,535 Population 1,557/sq mi density

49 ft Elevation 15 meters

51°F Avg Temperature 11°C

Ganghwa-gun experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 25°F in January while summers reach 74°F in July. The area gets 246 sunny days per year. Annual precipitation totals 49.5 inches. The area receives 2.4 inches of snow annually.

Temperature

25°F Jan (-4°C) 74°F Jul (24°C)

Annual Average	51.4°F
	5% below US avg
January Average	25°F (-4°C)
July Average	74°F (24°C)
Sunny Days	246 days/yr

Geography

Elevation	49 ft (15 m)
Area	16.4 sq mi (42.5 km²)
Population Density	1,557/sq mi
Coordinates	37.7472°N, 126.4856°W
Timezone	Asia/Seoul

Precipitation & Snow

Annual Rainfall 49.5"

30% above US avg

Snowfall 2.4"

Wettest Month (Jul) 12.64"

Driest Month (Jan) 0.71"

Air Quality

Earthquake History

4 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.3. Most recent: M3.6 on Jan 8, 2023.

Nov 11, 1992	8 km NW of Chunghwa, North Korea	M4.3	146 km
May 11, 2020	32 km E of Koksan, North Korea	M3.8	121 km
Jun 27, 2019	10 km W of Chunghwa, North Korea	M3.6	142 km
Jan 8, 2023	South Korea	M3.6	23 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

8 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 2.

Year	Name	Category	Closest
2020	Bavi	Category 2	153 km
2020	Maysak	Category 1	259 km
2020	Haishen	Category 1	246 km
2019	Lingling	Category 1	114 km
2010	Kompasu	Category 2	60 km
2000	Prapiroon	Category 1	132 km
1999	Olga	Category 1	287 km
1995	Faye	Category 2	222 km

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

Tsunami History

1 tsunami recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1700	YELLOW SEA	Earthquake	—	—	139 km

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

Nearby Volcanoes

1 volcano within 200 km. Closest: Ch'uga-ryong (98 km).

Name	Type	Elevation	Last Eruption	Distance
Ch'uga-ryong	Shield	452 m (1,483 ft)	Unknown	98 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	25°F (-4°C)	0.7 in	Coldest, Driest
February	29°F (-2°C)	0.8 in
March	39°F (4°C)	1.6 in
April	51°F (11°C)	2.9 in
May	61°F (16°C)	3.8 in
June	69°F (20°C)	4.9 in
July	74°F (24°C)	12.6 in	Wettest
August	76°F (24°C)	11.7 in	Warmest
September	67°F (20°C)	5.9 in
October	55°F (13°C)	1.9 in
November	42°F (5°C)	1.9 in
December	30°F (-1°C)	0.8 in

Ganghwa-gun has a seasonal temperature swing of 51°F / from 25°F in January to 76°F in August. Total annual precipitation is 49.5 inches, with July being the wettest month (12.6") and January the driest (0.7").

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