Sinan, South Korea

Full City Profile

53,150 Population 852/sq mi density

10 ft Elevation 3 meters

57°F Avg Temperature 14°C

Sinan enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 36°F in January while summers reach 76°F in July. The area gets 254 sunny days per year. Annual precipitation totals 45.4 inches. The area receives 0.0 inches of snow annually.

Temperature

36°F Jan (2°C) 76°F Jul (25°C)

Annual Average	57.0°F
	6% above US avg
January Average	36°F (2°C)
July Average	76°F (25°C)
Sunny Days	254 days/yr

Geography

Elevation	10 ft (3 m)
Area	62.4 sq mi (161.6 km²)
Population Density	852/sq mi
Coordinates	34.8262°N, 126.1086°W
Timezone	Asia/Seoul

Precipitation & Snow

Annual Rainfall 45.4"

20% above US avg

Snowfall 0.0"

Wettest Month (Jul) 8.54"

Driest Month (Dec) 1.22"

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	117 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	195 km
2020	Bavi	Category 3	157 km
2020	Haishen	Category 2	286 km
2020	Maysak	Category 2	213 km
2019	Lingling	Category 2	111 km
2018	Kong-rey	Category 1	230 km
2018	Soulik	Category 1	200 km
2016	Chaba	Category 2	178 km
2013	Danas	Category 1	253 km
2012	Sanba	Category 2	193 km
2012	Bolaven	Category 1	220 km
2012	Damrey	Category 1	275 km
2010	Kompasu	Category 3	127 km
2007	Nari	Category 2	124 km
2004	Megi	Category 1	247 km
2003	Maemi	Category 3	178 km
2003	Soudelor	Category 1	281 km
2002	Rusa	Category 1	137 km
2000	Saomai	Category 1	205 km
2000	Prapiroon	Category 1	190 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	—	—	76 km

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

Nearby Volcanoes

1 volcano within 200 km. Closest: Halla (168 km).

Name	Type	Elevation	Last Eruption	Distance
Halla	Shield	1,919 m (6,296 ft)	1007	168 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	36°F (2°C)	1.4 in	Coldest
February	38°F (3°C)	1.8 in
March	44°F (7°C)	2.4 in
April	54°F (12°C)	3.4 in
May	62°F (17°C)	3.7 in
June	70°F (21°C)	6.6 in
July	76°F (25°C)	8.5 in	Wettest
August	79°F (26°C)	7.1 in	Warmest
September	72°F (22°C)	5.2 in
October	62°F (17°C)	2.1 in
November	51°F (11°C)	2.1 in
December	41°F (5°C)	1.2 in	Driest

Sinan has a seasonal temperature swing of 42°F / from 36°F in January to 79°F in August. Total annual precipitation is 45.4 inches, with July being the wettest month (8.5") and December the driest (1.2").

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