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Weather & Climate in Koch'ang, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Koch'ang experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 31°F in January while summers reach 76°F in July. The area gets 245 sunny days per year, above the national average. Annual precipitation totals 50.1 inches (wetter than the 38-inch national average). The area receives 4.4 inches of snow annually. The city sits at an elevation of 144 feet.
Temperature
31°F Jan (-1°C)
76°F Jul (24°C)
| Annual Average | 54.3°F |
| 1% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 245 days/yr |
Geography
| Elevation | 144 ft (44 m) |
| Area | 234.3 sq mi (606.9 km²) |
| Population Density | 312/sq mi |
| Coordinates | 35.4333°N, 126.7000°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (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 | 36 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
29 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2022 | Hinnamnor | Category 2 | 86 mph | 188 km |
| 2020 | Bavi | Category 3 | 98 mph | 200 km |
| 2020 | Haishen | Category 2 | 98 mph | 227 km |
| 2020 | Maysak | Category 1 | 92 mph | 199 km |
| 2019 | Lingling | Category 2 | 81 mph | 174 km |
| 2018 | Kong-rey | Category 1 | 75 mph | 293 km |
| 2018 | Soulik | Category 1 | 81 mph | 282 km |
| 2018 | Prapiroon | Category 1 | 69 mph | 292 km |
| 2016 | Chaba | Category 1 | 81 mph | 172 km |
| 2013 | Danas | Category 1 | 69 mph | 254 km |
| 2012 | Sanba | Category 2 | 98 mph | 141 km |
| 2010 | Kompasu | Category 3 | 81 mph | 159 km |
| 2007 | Nari | Category 1 | 86 mph | 122 km |
| 2004 | Megi | Category 1 | 75 mph | 278 km |
| 2003 | Maemi | Category 3 | 92 mph | 157 km |
| 2003 | Soudelor | Category 1 | 69 mph | 266 km |
| 2002 | Rusa | Category 1 | 81 mph | 151 km |
| 2000 | Saomai | Category 1 | 69 mph | 204 km |
| 2000 | Prapiroon | Category 1 | 81 mph | 220 km |
| 1999 | Olga | Category 1 | 69 mph | 69 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 | — | — | 120 km |
| 1649 | YELLOW SEA | Earthquake | — | — | 64 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 1.4 in | Coldest |
| February | 34°F (1°C) | 1.7 in | |
| March | 42°F (5°C) | 2.2 in | |
| April | 53°F (12°C) | 3.6 in | |
| May | 62°F (17°C) | 3.6 in | |
| June | 69°F (21°C) | 6.7 in | |
| July | 76°F (24°C) | 10.6 in | Wettest |
| August | 77°F (25°C) | 9.3 in | Warmest |
| September | 69°F (20°C) | 5.4 in | |
| October | 58°F (15°C) | 2.2 in | |
| November | 46°F (8°C) | 2.1 in | |
| December | 36°F (2°C) | 1.3 in | Driest |
Koch'ang has a seasonal temperature swing of 47°F / from 31°F in January to 77°F in August. Total annual precipitation is 50.1 inches, with July being the wettest month (10.6") and December the driest (1.3").