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Ansan-si, South Korea

Full City Profile

623,256 Population 10,805/sq mi density
49 ft Elevation 15 meters
53°F Avg Temperature 12°C
Ansan-si experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 26°F in January while summers reach 77°F in July. The area gets 246 sunny days per year. Annual precipitation totals 49.8 inches. The area receives 3.4 inches of snow annually.

Temperature

26°F Jan (-4°C) 77°F Jul (25°C)
Annual Average52.9°F
2% below US avg
January Average26°F (-4°C)
July Average77°F (25°C)
Sunny Days246 days/yr

Geography

Elevation49 ft (15 m)
Area57.7 sq mi (149.4 km²)
Population Density10,805/sq mi
Coordinates37.3236°N, 126.8219°W
TimezoneAsia/Seoul

Precipitation & Snow

Annual Rainfall 49.8"
31% above US avg
Snowfall 3.4"
Wettest Month (Jul) 11.69"
Driest Month (Dec) 1.02"

Air Quality

Earthquake History

3 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.7. Most recent: M3.6 on Jan 8, 2023.

Jan 20, 2007 25 km NNE of Pyeongchang, South Korea M4.7 149 km
Jan 8, 2023 South Korea M3.6 72 km
Jan 29, 2020 21 km WNW of Mungyeong, South Korea M3.5 126 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year Name Category Closest
2020 Bavi Category 2 183 km
2020 Maysak Category 1 221 km
2020 Haishen Category 1 205 km
2019 Lingling Category 2 157 km
2012 Sanba Category 1 276 km
2010 Kompasu Category 2 64 km
2003 Maemi Category 2 251 km
2000 Prapiroon Category 1 152 km
1999 Olga Category 1 247 km
1995 Faye Category 2 177 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 96 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

1 volcano within 200 km. Closest: Ch'uga-ryong (121 km).

Name Type Elevation Last Eruption Distance
Ch'uga-ryong Shield 452 m (1,483 ft) Unknown 121 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-4°C) 1.1 in Coldest
February 31°F (-1°C) 1.3 in
March 41°F (5°C) 2.0 in
April 53°F (12°C) 3.4 in
May 63°F (17°C) 3.6 in
June 71°F (21°C) 5.1 in
July 77°F (25°C) 11.7 in Wettest
August 77°F (25°C) 10.5 in Warmest
September 68°F (20°C) 5.9 in
October 56°F (14°C) 2.2 in
November 43°F (6°C) 2.1 in
December 31°F (-1°C) 1.0 in Driest

Ansan-si has a seasonal temperature swing of 52°F / from 26°F in January to 77°F in August. Total annual precipitation is 49.8 inches, with July being the wettest month (11.7") and December the driest (1.0").

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