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Weather & Climate in Ulsan, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ulsan enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 33°F in January while summers reach 76°F in July. The area gets 247 sunny days per year, above the national average. Annual precipitation totals 48.9 inches (wetter than the 38-inch national average). The area receives 1.3 inches of snow annually. The city sits at an elevation of 33 feet.
Temperature
33°F Jan (1°C)
76°F Jul (24°C)
| Annual Average | 55.6°F |
| 3% above US avg | |
| January Average | 33°F (1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 247 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 2,147,086/sq mi |
| Coordinates | 35.5372°N, 129.3167°W |
| Timezone | Asia/Seoul |
Precipitation & Snow
Air Quality
Earthquake History
13 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.
| Sep 12, 2016 | 6km S of Gyeongju, South Korea | M5.4 | 29 km | 13 km |
| May 29, 2004 | 78 km NE of Heunghae, South Korea | M5.3 | 134 km | 29 km |
| Sep 12, 2016 | 14km SW of Gyeongju, South Korea | M4.9 | 30 km | 10 km |
| Jun 25, 1997 | 3 km SW of Gyeongju, South Korea | M4.7 | 34 km | 10 km |
| Feb 10, 2018 | 5 km SW of Heunghae, South Korea | M4.7 | 60 km | 5 km |
| Jul 5, 2016 | 52 km E of Ulsan, South Korea | M4.7 | 53 km | 10 km |
| Sep 19, 2016 | 10 km SSW of Gyeongju, South Korea | M4.6 | 29 km | 9 km |
| Jun 29, 2005 | 80 km SE of Kyosai, South Korea | M4.5 | 132 km | 15 km |
| Nov 9, 1995 | 79 km ENE of Heunghae, South Korea | M4.5 | 119 km | 33 km |
| Dec 13, 1992 | 66 km E of Ulsan, South Korea | M4.4 | 67 km | 27 km |
| Oct 7, 1995 | 75 km E of Ulsan, South Korea | M4.0 | 75 km | 54 km |
| Dec 9, 2000 | 60 km NE of Heunghae, South Korea | M3.8 | 112 km | 33 km |
| Sep 21, 2016 | 9km SSE of Gyeongju, South Korea | M3.5 | 25 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
33 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 | 39 km |
| 2022 | Nanmadol | Category 1 | 81 mph | 245 km |
| 2020 | Haishen | Category 2 | 98 mph | 11 km |
| 2020 | Maysak | Category 1 | 92 mph | 38 km |
| 2018 | Prapiroon | Category 1 | 69 mph | 194 km |
| 2016 | Chaba | Category 1 | 81 mph | 168 km |
| 2015 | Goni | Category 2 | 81 mph | 157 km |
| 2013 | Danas | Category 1 | 69 mph | 218 km |
| 2012 | Sanba | Category 2 | 98 mph | 112 km |
| 2007 | Nari | Category 1 | 86 mph | 209 km |
| 2007 | Usagi | Category 1 | 69 mph | 216 km |
| 2006 | Shanshan | Category 1 | 92 mph | 198 km |
| 2005 | Nabi | Category 1 | 75 mph | 186 km |
| 2004 | Songda | Category 2 | 86 mph | 226 km |
| 2004 | Chaba | Category 2 | 81 mph | 270 km |
| 2003 | Maemi | Category 3 | 92 mph | 49 km |
| 2003 | Soudelor | Category 1 | 69 mph | 74 km |
| 2002 | Rusa | Category 1 | 81 mph | 230 km |
| 2000 | Saomai | Category 1 | 69 mph | 204 km |
| 1999 | Bart | Category 2 | 92 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 |
| 1643 | SEA OF JAPAN | Earthquake | — | — | 17 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 1.3 in | Coldest |
| February | 36°F (2°C) | 1.7 in | |
| March | 44°F (7°C) | 2.6 in | |
| April | 55°F (13°C) | 4.1 in | |
| May | 63°F (17°C) | 4.1 in | |
| June | 69°F (20°C) | 6.9 in | |
| July | 76°F (24°C) | 9.1 in | Wettest |
| August | 77°F (25°C) | 8.3 in | Warmest |
| September | 69°F (21°C) | 5.9 in | |
| October | 59°F (15°C) | 2.2 in | |
| November | 48°F (9°C) | 1.9 in | |
| December | 38°F (3°C) | 0.9 in | Driest |
Ulsan has a seasonal temperature swing of 44°F / from 33°F in January to 77°F in August. Total annual precipitation is 48.9 inches, with July being the wettest month (9.1") and December the driest (0.9").