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Weather & Climate in Seosan, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Seosan experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 29°F in January while summers reach 76°F in July. The area gets 250 sunny days per year, above the national average. Annual precipitation totals 47.6 inches (wetter than the 38-inch national average). The area receives 3.8 inches of snow annually. The city sits at an elevation of 108 feet.
Temperature
29°F Jan (-2°C)
76°F Jul (24°C)
| Annual Average | 53.3°F |
| 1% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 250 days/yr |
Geography
| Elevation | 108 ft (33 m) |
| Area | 286.0 sq mi (740.8 km²) |
| Population Density | 259/sq mi |
| Coordinates | 36.7817°N, 126.4522°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.4.
| Jun 11, 2024 | 3 km NW of Puan, South Korea | M4.4 | 116 km | 10 km |
| Jan 8, 2023 | South Korea | M3.6 | 111 km | 17 km |
| Jan 29, 2020 | 21 km WNW of Mungyeong, South Korea | M3.5 | 138 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
14 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2020 | Bavi | Category 2 | 92 mph | 149 km |
| 2020 | Maysak | Category 1 | 92 mph | 256 km |
| 2020 | Haishen | Category 1 | 92 mph | 237 km |
| 2019 | Lingling | Category 2 | 75 mph | 138 km |
| 2012 | Sanba | Category 2 | 86 mph | 244 km |
| 2010 | Kompasu | Category 2 | 81 mph | 66 km |
| 2007 | Nari | Category 1 | 75 mph | 268 km |
| 2003 | Maemi | Category 2 | 86 mph | 248 km |
| 2002 | Rusa | Category 1 | 81 mph | 300 km |
| 2000 | Prapiroon | Category 1 | 81 mph | 133 km |
| 1999 | Olga | Category 1 | 63 mph | 181 km |
| 1995 | Faye | Category 2 | 75 mph | 187 km |
| 1987 | Thelma | Category 1 | 86 mph | 295 km |
| 1985 | Kit | Category 1 | 52 mph | 276 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1700 | YELLOW SEA | Earthquake | — | — | 32 km |
| 1649 | YELLOW SEA | Earthquake | — | — | 148 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Ch'uga-ryong (189 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ch'uga-ryong | Shield | 452 m (1,483 ft) | Unknown | 189 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.2 in | Coldest, Driest |
| February | 32°F (-0°C) | 1.3 in | |
| March | 40°F (5°C) | 1.9 in | |
| April | 52°F (11°C) | 3.4 in | |
| May | 61°F (16°C) | 3.7 in | |
| June | 70°F (21°C) | 4.7 in | |
| July | 76°F (24°C) | 10.5 in | Wettest |
| August | 77°F (25°C) | 9.5 in | Warmest |
| September | 69°F (20°C) | 5.7 in | |
| October | 57°F (14°C) | 2.3 in | |
| November | 45°F (7°C) | 2.2 in | |
| December | 34°F (1°C) | 1.3 in |
Seosan has a seasonal temperature swing of 48°F / from 29°F in January to 77°F in August. Total annual precipitation is 47.6 inches, with July being the wettest month (10.5") and January the driest (1.2").