All Countries
Weather & Climate in Kōshi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kōshi enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 41°F in January while summers reach 80°F in July. The area gets 205 sunny days per year. Annual precipitation totals 76.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 233 feet.
Temperature
41°F Jan (5°C)
80°F Jul (27°C)
| Annual Average | 61.0°F |
| 13% above US avg | |
| January Average | 41°F (5°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 205 days/yr |
Geography
| Elevation | 233 ft (71 m) |
| Area | 25.2 sq mi (65.4 km²) |
| Population Density | 2,447/sq mi |
| Coordinates | 32.8927°N, 130.7757°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
406 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Aug 8, 2024 | 2024 Hyuganada Sea, Japan Earthquake | M7.1 | 143 km | 24 km |
| Apr 15, 2016 | 6 km ESE of Kumamoto, Japan | M7.0 | 12 km | 10 km |
| Jan 13, 2025 | 15 km SE of Miyazaki, Japan | M6.8 | 139 km | 39 km |
| Oct 19, 1996 | 5 km SE of Miyazaki, Japan | M6.7 | 130 km | 22 km |
| Dec 2, 1996 | 17 km SW of Miyazaki, Japan | M6.7 | 133 km | 49 km |
| Mar 20, 2005 | 28 km NNW of Maebaru-ch??, Japan | M6.6 | 118 km | 10 km |
| Mar 13, 2014 | 32 km SSW of Hikari, Japan | M6.3 | 131 km | 79 km |
| Jan 21, 2022 | 27 km SSE of Saiki, Japan | M6.3 | 119 km | 39 km |
| Jun 11, 2006 | 15 km S of Tsukawaki, Japan | M6.3 | 44 km | 140 km |
| Apr 14, 2016 | 2 km SSE of Kumamoto, Japan | M6.2 | 13 km | 9 km |
| May 13, 1997 | 1 km WNW of Satsumasendai, Japan | M6.1 | 128 km | 33 km |
| Mar 26, 1997 | 16 km NE of Satsumasendai, Japan | M6.1 | 113 km | 10 km |
| Apr 14, 2016 | 5 km ENE of Uto, Japan | M6.0 | 22 km | 8 km |
| Apr 5, 2009 | 10 km N of Miyazaki, Japan | M5.8 | 115 km | 26 km |
| Apr 25, 2001 | 18 km SE of Saiki, Japan | M5.7 | 117 km | 33 km |
| Apr 15, 2016 | 6 km S of Kikuchi, Japan | M5.7 | 5 km | 10 km |
| Oct 19, 1996 | 19 km ENE of Miyazaki, Japan | M5.7 | 130 km | 33 km |
| May 22, 1998 | 9 km NE of Bungo-Takada-shi, Japan | M5.5 | 106 km | 81 km |
| Apr 2, 1997 | 19 km W of Satsumasendai, Japan | M5.5 | 135 km | 10 km |
| Apr 18, 2016 | 8 km NNE of Aso, Japan | M5.5 | 33 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
65 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Shanshan | Category 3 | 109 mph | 62 km |
| 2022 | Nanmadol | Category 3 | 104 mph | 48 km |
| 2022 | Hinnamnor | Category 1 | 81 mph | 287 km |
| 2020 | Haishen | Category 3 | 104 mph | 157 km |
| 2020 | Maysak | Category 1 | 92 mph | 270 km |
| 2019 | Francisco | Category 1 | 81 mph | 16 km |
| 2018 | Jebi | Category 3 | 98 mph | 288 km |
| 2018 | Trami | Category 1 | 98 mph | 197 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 178 km |
| 2017 | Noru | Category 1 | 69 mph | 188 km |
| 2016 | Malakas | Category 3 | 109 mph | 159 km |
| 2016 | Chaba | Category 1 | 75 mph | 299 km |
| 2016 | Namtheun | Category 1 | 75 mph | 247 km |
| 2015 | Goni | Category 3 | 104 mph | 37 km |
| 2014 | Phanfone | Category 2 | 98 mph | 290 km |
| 2014 | Halong | Category 1 | 86 mph | 220 km |
| 2013 | Danas | Category 1 | 75 mph | 230 km |
| 2012 | Sanba | Category 3 | 104 mph | 269 km |
| 2012 | Damrey | Category 1 | 63 mph | 290 km |
| 2011 | Ma-on | Category 1 | 86 mph | 210 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 55.0 m (180 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1792 | SHIMABARA BAY, KYUSHU ISLAND | Landslide | 55.0 m | 15,000 | 47 km |
| 1596 | BEPPU BAY, KYUSHU | Eruption + Earthquake | 8.0 m | 708 | 97 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | 6.0 m | — | 144 km |
| 1914 | SEIKAIDO | Eruption | 3.0 m | 63 | 146 km |
| 1769 | SW. KYUSHU ISLAND | Earthquake | 2.5 m | — | 132 km |
| 1939 | SEIKAIDO | Earthquake | 0.8 m | 1 | 132 km |
| 1931 | SEIKAIDO | Earthquake | 0.8 m | 1 | 146 km |
| 1996 | KYUSHU ISLAND | Earthquake | 0.6 m | — | 130 km |
| 2024 | HYUGANADA SEA | Earthquake | 0.5 m | — | 148 km |
| 1970 | SEIKAIDO | Earthquake | 0.3 m | — | 116 km |
| 2025 | HYUGANADA SEA | Earthquake | 0.2 m | — | 142 km |
| 1996 | SEA OF JAPAN | Earthquake | 0.2 m | — | 133 km |
| 1984 | KYUSHU, JAPAN | Earthquake | 0.2 m | — | 123 km |
| 1969 | RYUKYU ISLANDS | Earthquake | 0.1 m | — | 146 km |
| 1987 | KYUSHU ISLAND | Earthquake | 0.0 m | 2 | 138 km |
| 1899 | SEIKAIDO | Earthquake | — | — | 144 km |
| 1828 | AMAKUSA SEA | Earthquake | — | — | 88 km |
| 1781 | SW. KYUSHU ISLAND | Astronomical | — | 38 | 146 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | — | — | 144 km |
| 1715 | SEIKAIDO | Earthquake | — | — | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Asosan (31 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 31 km |
| Unzendake | Complex | 1,483 m (4,865 ft) | 1996 | 47 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 49 km |
| Yufu-Tsurumi | Lava dome(s) | 1,584 m (5,197 ft) | 867 | 72 km |
| Kirishimayama | Shield | 1,700 m (5,577 ft) | 2018 | 107 km |
| Yonemaru-Sumiyoshiike | Maar(s) | 40 m (131 ft) | -6200 | 126 km |
| Aira | Caldera | 1,117 m (3,665 ft) | 2020 | 145 km |
| Fukue | Shield(s) | 315 m (1,033 ft) | -400 | 182 km |
| Ata | Caldera(s) | 924 m (3,031 ft) | 885 | 187 km |
| Abu | Shield(s) | 641 m (2,103 ft) | -6850 | 194 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 2.3 in | Coldest |
| February | 43°F (6°C) | 3.2 in | |
| March | 49°F (10°C) | 4.8 in | |
| April | 59°F (15°C) | 6.1 in | |
| May | 67°F (19°C) | 7.5 in | |
| June | 73°F (23°C) | 14.5 in | |
| July | 80°F (27°C) | 14.6 in | Wettest |
| August | 81°F (27°C) | 7.4 in | Warmest |
| September | 75°F (24°C) | 7.0 in | |
| October | 65°F (18°C) | 3.7 in | |
| November | 54°F (12°C) | 2.8 in | |
| December | 45°F (7°C) | 2.1 in | Driest |
Kōshi has a seasonal temperature swing of 40°F / from 41°F in January to 81°F in August. Total annual precipitation is 76.1 inches, with July being the wettest month (14.6") and December the driest (2.1").