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Weather & Climate in Iwon, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Iwon experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 75°F in July. The area gets 268 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 68.3 inches (wetter than the 38-inch national average). The area receives 4.9 inches of snow annually. The city sits at an elevation of 371 feet.
Temperature
29°F Jan (-2°C)
75°F Jul (24°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 371 ft (113 m) |
| Area | 277.2 sq mi (718.0 km²) |
| Population Density | 0/sq mi |
| Coordinates | 36.2461°N, 127.6196°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
6 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Sep 12, 2016 | 14km SW of Gyeongju, South Korea | M4.9 | 145 km | 10 km |
| Dec 13, 1996 | 20 km W of T’aebaek, South Korea | M4.8 | 143 km | 10 km |
| Jun 25, 1997 | 3 km SW of Gyeongju, South Korea | M4.7 | 149 km | 10 km |
| Sep 19, 2016 | 10 km SSW of Gyeongju, South Korea | M4.6 | 149 km | 9 km |
| Jun 11, 2024 | 3 km NW of Puan, South Korea | M4.4 | 98 km | 10 km |
| Jan 29, 2020 | 21 km WNW of Mungyeong, South Korea | M3.5 | 59 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
25 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 | 184 km |
| 2020 | Bavi | Category 2 | 92 mph | 265 km |
| 2020 | Haishen | Category 1 | 92 mph | 157 km |
| 2020 | Maysak | Category 1 | 92 mph | 142 km |
| 2019 | Lingling | Category 2 | 75 mph | 251 km |
| 2016 | Chaba | Category 1 | 75 mph | 210 km |
| 2013 | Danas | Category 1 | 69 mph | 294 km |
| 2012 | Sanba | Category 2 | 86 mph | 138 km |
| 2010 | Kompasu | Category 2 | 81 mph | 179 km |
| 2007 | Nari | Category 1 | 81 mph | 195 km |
| 2003 | Maemi | Category 3 | 92 mph | 130 km |
| 2003 | Soudelor | Category 1 | 69 mph | 241 km |
| 2002 | Rusa | Category 1 | 81 mph | 228 km |
| 2000 | Saomai | Category 1 | 69 mph | 254 km |
| 2000 | Prapiroon | Category 1 | 69 mph | 253 km |
| 1999 | Olga | Category 1 | 63 mph | 187 km |
| 1995 | Faye | Category 2 | 75 mph | 67 km |
| 1994 | Seth | Category 1 | 58 mph | 285 km |
| 1993 | Robyn | Category 1 | 92 mph | 282 km |
| 1991 | Caitlin | Category 1 | 86 mph | 235 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1700 | YELLOW SEA | Earthquake | — | — | 104 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.1 in | Coldest, Driest |
| February | 31°F (-1°C) | 1.5 in | |
| March | 40°F (5°C) | 2.1 in | |
| April | 53°F (12°C) | 3.7 in | |
| May | 62°F (17°C) | 3.6 in | |
| June | 70°F (21°C) | 6.4 in | |
| July | 75°F (24°C) | 11.9 in | Wettest |
| August | 76°F (24°C) | 9.9 in | Warmest |
| September | 67°F (19°C) | 5.5 in | |
| October | 55°F (13°C) | 1.9 in | |
| November | 43°F (6°C) | 1.8 in | |
| December | 32°F (-0°C) | 1.1 in |
Iwon has a seasonal temperature swing of 46°F / from 29°F in January to 76°F in August. Total annual precipitation is 50.5 inches, with July being the wettest month (11.9") and January the driest (1.1").