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Weather & Climate in Yŏnmu, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Yŏnmu experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 30°F in January while summers reach 77°F in July. The area gets 245 sunny days per year, above the national average. Annual precipitation totals 50.3 inches (wetter than the 38-inch national average). The area receives 4.0 inches of snow annually. The city sits at an elevation of 115 feet.
Temperature
30°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 54.3°F |
| 1% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 245 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 242.1 sq mi (626.9 km²) |
| Population Density | 103/sq mi |
| Coordinates | 36.1294°N, 127.1000°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
2 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 | 55 km | 10 km |
| Jan 29, 2020 | 21 km WNW of Mungyeong, South Korea | M3.5 | 101 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
23 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2022 | Hinnamnor | Category 1 | 81 mph | 216 km |
| 2020 | Bavi | Category 2 | 98 mph | 225 km |
| 2020 | Haishen | Category 1 | 92 mph | 202 km |
| 2020 | Maysak | Category 1 | 92 mph | 177 km |
| 2019 | Lingling | Category 2 | 81 mph | 210 km |
| 2016 | Chaba | Category 1 | 81 mph | 213 km |
| 2013 | Danas | Category 1 | 69 mph | 299 km |
| 2012 | Sanba | Category 2 | 86 mph | 152 km |
| 2010 | Kompasu | Category 2 | 81 mph | 155 km |
| 2007 | Nari | Category 1 | 81 mph | 183 km |
| 2003 | Maemi | Category 3 | 92 mph | 173 km |
| 2003 | Soudelor | Category 1 | 69 mph | 275 km |
| 2002 | Rusa | Category 1 | 81 mph | 216 km |
| 2000 | Saomai | Category 1 | 69 mph | 254 km |
| 2000 | Prapiroon | Category 1 | 81 mph | 221 km |
| 1999 | Olga | Category 1 | 69 mph | 143 km |
| 1995 | Faye | Category 2 | 75 mph | 109 km |
| 1994 | Seth | Category 1 | 58 mph | 262 km |
| 1991 | Caitlin | Category 1 | 86 mph | 270 km |
| 1987 | Dinah | Category 1 | 98 mph | 268 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 | — | — | 68 km |
| 1649 | YELLOW SEA | Earthquake | — | — | 121 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 1.2 in | Coldest, Driest |
| February | 33°F (0°C) | 1.5 in | |
| March | 42°F (5°C) | 2.1 in | |
| April | 54°F (12°C) | 3.7 in | |
| May | 63°F (17°C) | 3.6 in | |
| June | 71°F (22°C) | 6.2 in | |
| July | 77°F (25°C) | 11.5 in | Wettest |
| August | 78°F (26°C) | 9.7 in | Warmest |
| September | 69°F (20°C) | 5.4 in | |
| October | 57°F (14°C) | 2.0 in | |
| November | 45°F (7°C) | 2.1 in | |
| December | 34°F (1°C) | 1.3 in |
Yŏnmu has a seasonal temperature swing of 48°F / from 30°F in January to 78°F in August. Total annual precipitation is 50.3 inches, with July being the wettest month (11.5") and January the driest (1.2").