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Weather & Climate in Haean, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Haean experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 21°F in January while summers reach 73°F in July. The area gets 278 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 48.4 inches (wetter than the 38-inch national average). The area receives 32.0 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,424 feet.
Temperature
21°F Jan (-6°C)
73°F Jul (23°C)
| Annual Average | 50.5°F |
| 6% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 278 days/yr |
Geography
| Elevation | 1,424 ft (434 m) |
| Area | 270.6 sq mi (700.8 km²) |
| Population Density | 0/sq mi |
| Coordinates | 38.2863°N, 128.1377°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Dec 13, 1996 | 20 km W of T’aebaek, South Korea | M4.8 | 139 km | 10 km |
| Jan 20, 2007 | 25 km NNE of Pyeongchang, South Korea | M4.7 | 83 km | 10 km |
| Apr 19, 2019 | 50 km NE of Tonghae, South Korea | M4.4 | 130 km | 10 km |
| May 14, 2023 | 45 km NE of Tonghae, South Korea | M3.9 | 127 km | 13 km |
| May 11, 2020 | 32 km E of Koksan, North Korea | M3.8 | 109 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
9 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2022 | Hinnamnor | Category 1 | 75 mph | 296 km |
| 2020 | Bavi | Category 1 | 81 mph | 292 km |
| 2020 | Maysak | Category 1 | 81 mph | 167 km |
| 2020 | Haishen | Category 1 | 69 mph | 166 km |
| 2019 | Lingling | Category 1 | 75 mph | 261 km |
| 2010 | Kompasu | Category 1 | 69 mph | 85 km |
| 2003 | Maemi | Category 2 | 69 mph | 205 km |
| 2000 | Prapiroon | Category 1 | 69 mph | 289 km |
| 1995 | Faye | Category 1 | 58 mph | 173 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Ch'uga-ryong (71 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ch'uga-ryong | Shield | 452 m (1,483 ft) | Unknown | 71 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 1.0 in | Coldest, Driest |
| February | 29°F (-2°C) | 1.2 in | |
| March | 38°F (3°C) | 1.6 in | |
| April | 51°F (10°C) | 2.8 in | |
| May | 60°F (15°C) | 3.5 in | |
| June | 67°F (19°C) | 4.8 in | |
| July | 73°F (23°C) | 11.2 in | Wettest |
| August | 73°F (23°C) | 10.8 in | Warmest |
| September | 65°F (18°C) | 6.6 in | |
| October | 54°F (12°C) | 2.2 in | |
| November | 42°F (5°C) | 2.0 in | |
| December | 31°F (-1°C) | 1.1 in |
Haean has a seasonal temperature swing of 53°F / from 21°F in January to 73°F in August. Total annual precipitation is 48.8 inches, with July being the wettest month (11.2") and January the driest (1.0").