All Countries
Weather & Climate in Sinan, South Korea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sinan enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 36°F in January while summers reach 76°F in July. The area gets 254 sunny days per year, above the national average. Annual precipitation totals 45.4 inches. The city sits at an elevation of 10 feet.
Temperature
36°F Jan (2°C)
76°F Jul (25°C)
| Annual Average | 57.0°F |
| 6% above US avg | |
| January Average | 36°F (2°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 254 days/yr |
Geography
| Elevation | 10 ft (3 m) |
| Area | 62.4 sq mi (161.6 km²) |
| Population Density | 852/sq mi |
| Coordinates | 34.8262°N, 126.1086°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 | 117 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
30 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 | 195 km |
| 2020 | Bavi | Category 3 | 98 mph | 157 km |
| 2020 | Haishen | Category 2 | 98 mph | 286 km |
| 2020 | Maysak | Category 2 | 92 mph | 213 km |
| 2019 | Lingling | Category 2 | 81 mph | 111 km |
| 2018 | Kong-rey | Category 1 | 75 mph | 230 km |
| 2018 | Soulik | Category 1 | 81 mph | 200 km |
| 2016 | Chaba | Category 2 | 81 mph | 178 km |
| 2013 | Danas | Category 1 | 75 mph | 253 km |
| 2012 | Sanba | Category 2 | 98 mph | 193 km |
| 2012 | Bolaven | Category 1 | 75 mph | 220 km |
| 2012 | Damrey | Category 1 | 75 mph | 275 km |
| 2010 | Kompasu | Category 3 | 81 mph | 127 km |
| 2007 | Nari | Category 2 | 86 mph | 124 km |
| 2004 | Megi | Category 1 | 75 mph | 247 km |
| 2003 | Maemi | Category 3 | 104 mph | 178 km |
| 2003 | Soudelor | Category 1 | 69 mph | 281 km |
| 2002 | Rusa | Category 1 | 81 mph | 137 km |
| 2000 | Saomai | Category 1 | 69 mph | 205 km |
| 2000 | Prapiroon | Category 1 | 81 mph | 190 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1649 | YELLOW SEA | Earthquake | — | — | 76 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Halla (168 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Halla | Shield | 1,919 m (6,296 ft) | 1007 | 168 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 36°F (2°C) | 1.4 in | Coldest |
| February | 38°F (3°C) | 1.8 in | |
| March | 44°F (7°C) | 2.4 in | |
| April | 54°F (12°C) | 3.4 in | |
| May | 62°F (17°C) | 3.7 in | |
| June | 70°F (21°C) | 6.6 in | |
| July | 76°F (25°C) | 8.5 in | Wettest |
| August | 79°F (26°C) | 7.1 in | Warmest |
| September | 72°F (22°C) | 5.2 in | |
| October | 62°F (17°C) | 2.1 in | |
| November | 51°F (11°C) | 2.1 in | |
| December | 41°F (5°C) | 1.2 in | Driest |
Sinan has a seasonal temperature swing of 42°F / from 36°F in January to 79°F in August. Total annual precipitation is 45.4 inches, with July being the wettest month (8.5") and December the driest (1.2").