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Weather & Climate in Kōchi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kōchi enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 42°F in January while summers reach 74°F in July. The area gets 190 sunny days per year. Annual precipitation totals 80.2 inches (wetter than the 38-inch national average). The city sits at an elevation of 144 feet.
Temperature
42°F Jan (6°C)
74°F Jul (23°C)
| Annual Average | 58.6°F |
| 9% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 190 days/yr |
Geography
| Elevation | 144 ft (44 m) |
| Area | 38.9 sq mi (100.7 km²) |
| Population Density | 185/sq mi |
| Coordinates | 34.7001°N, 138.9374°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
1,640 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.5.
| Jul 30, 2000 | 94 km SSE of Shimoda, Japan | M6.5 | 98 km | 10 km |
| Sep 3, 1991 | 115 km S of Shimoda, Japan | M6.4 | 118 km | 27 km |
| Feb 20, 1990 | 28 km E of Shimoda, Japan | M6.4 | 29 km | 14 km |
| Aug 10, 2009 | 8 km NE of Sagara, Japan | M6.2 | 62 km | 40 km |
| Jul 15, 2000 | near the south coast of Honshu, Japan | M6.1 | 52 km | 10 km |
| Jul 1, 2000 | 53 km SSE of Shimoda, Japan | M6.1 | 56 km | 10 km |
| Mar 15, 2011 | 6 km NNW of Fujinomiya, Japan | M6.0 | 71 km | 9 km |
| May 4, 2014 | 31 km ESE of It?, Japan | M6.0 | 50 km | 153 km |
| Jan 15, 2007 | 15 km WSW of Heda, Japan | M5.9 | 35 km | 170 km |
| Jul 23, 2005 | 9 km WSW of Ichihara, Japan | M5.9 | 130 km | 61 km |
| Oct 6, 1995 | 68 km S of Shimoda, Japan | M5.9 | 71 km | 33 km |
| Aug 1, 2011 | 20 km E of ?yama, Japan | M5.9 | 47 km | 13 km |
| Jul 8, 2000 | 71 km SSE of Shimoda, Japan | M5.9 | 74 km | 10 km |
| May 23, 1997 | 38 km SSE of Tahara, Japan | M5.8 | 138 km | 11 km |
| Feb 1, 1992 | 4 km SSE of Miura, Japan | M5.8 | 79 km | 100 km |
| Jul 2, 2000 | 71 km SSE of Shimoda, Japan | M5.7 | 74 km | 10 km |
| Sep 20, 2003 | 12 km SSE of Kamogawa, Japan | M5.7 | 117 km | 52 km |
| Jul 30, 2000 | 90 km SSE of Shimoda, Japan | M5.7 | 93 km | 10 km |
| Aug 18, 2000 | 64 km SSE of Shimoda, Japan | M5.7 | 68 km | 10 km |
| May 3, 1998 | 14 km SW of It?, Japan | M5.6 | 19 km | 34 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
50 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Halong | Category 4 | — | 237 km |
| 2025 | Nakri | Category 1 | — | 218 km |
| 2024 | Ampil | Category 3 | 98 mph | 198 km |
| 2024 | Jebi | Category 1 | 75 mph | 286 km |
| 2019 | Faxai | Category 4 | 98 mph | 33 km |
| 2019 | Hagibis | Category 2 | 92 mph | 24 km |
| 2018 | Jongdari | Category 2 | 86 mph | 81 km |
| 2018 | Shanshan | Category 1 | 81 mph | 198 km |
| 2017 | Lan | Category 2 | 104 mph | 216 km |
| 2016 | Mindulle | Category 1 | 75 mph | 68 km |
| 2014 | Phanfone | Category 1 | 81 mph | 54 km |
| 2013 | Wipha | Category 1 | 81 mph | 212 km |
| 2011 | Roke | Category 3 | 92 mph | 106 km |
| 2010 | Chaba | Category 1 | 75 mph | 233 km |
| 2009 | Melor | Category 1 | 86 mph | 228 km |
| 2009 | Krovanh | Category 1 | 69 mph | 160 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 230 km |
| 2007 | Fitow | Category 1 | 81 mph | 12 km |
| 2005 | Saola | Category 2 | 86 mph | 240 km |
| 2005 | Mawar | Category 2 | 92 mph | 19 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 21.0 m (69 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1854 | ENSHUNADA SEA | Earthquake | 21.0 m | 1,000 | 123 km |
| 1923 | SAGAMI BAY | Earthquake | 13.0 m | 105,385 | 68 km |
| 1703 | OFF SW BOSO PENINSULA | Earthquake | 11.7 m | 5,233 | 79 km |
| 1707 | ENSHUNADA | Earthquake | 11.0 m | 2,000 | 124 km |
| 1498 | ENSHUNADA SEA | Earthquake | 10.0 m | 5,000 | 109 km |
| 1495 | KAMAKURA, SAGAMI BAY, TOKAIDO | Earthquake | 5.0 m | 200 | 68 km |
| 1855 | ENSHUNADA | Earthquake | 3.0 m | — | 124 km |
| 1433 | OFF IZU-OSHIMA | Earthquake | 2.0 m | — | 56 km |
| 2009 | HONSHU: S COAST | Earthquake | 0.6 m | 1 | 62 km |
| 1980 | HONSHU ISLAND | Earthquake | 0.6 m | — | 25 km |
| 1978 | TOKAIDO | Earthquake | 0.4 m | 25 | 32 km |
| 1923 | RYUKYU ISLANDS | Earthquake | 0.3 m | — | 117 km |
| 1974 | TOKAIDO | Earthquake | 0.2 m | 30 | 24 km |
| 1982 | S. OF HONSHU ISLAND | Earthquake | 0.2 m | — | 107 km |
| 1990 | JAPAN | Earthquake | 0.2 m | — | 29 km |
| 2000 | HONSHU: S COAST | Earthquake | 0.1 m | — | 98 km |
| 2000 | HONSHU: S COAST | Earthquake | 0.1 m | — | 52 km |
| 2000 | KOZU-SHIMA ISLAND, HONSHU | Earthquake | 0.1 m | 1 | 56 km |
| 1857 | TOKAIDO | Earthquake | — | — | 59 km |
| 1855 | TOKAIDO | Earthquake | — | 6,757 | 132 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
14 volcanoes within 200 km. Closest: Izu-Tobu (27 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Izu-Tobu | Pyroclastic cone(s) | 1,406 m (4,613 ft) | 1989 | 27 km |
| Toshima | Stratovolcano | 508 m (1,667 ft) | -4550 | 37 km |
| Izu-Oshima | Stratovolcano | 758 m (2,487 ft) | 1990 | 42 km |
| Niijima | Lava dome(s) | 432 m (1,417 ft) | 886 | 45 km |
| Kozushima | Lava dome(s) | 572 m (1,877 ft) | 838 | 57 km |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 60 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 76 km |
| Miyakejima | Stratovolcano | 775 m (2,543 ft) | 2010 | 86 km |
| Mikurajima | Stratovolcano | 851 m (2,792 ft) | -4100 | 110 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 164 km |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 187 km |
| Hachijojima | Stratovolcano(es) | 854 m (2,802 ft) | 1606 | 190 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 193 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.9 in | |
| February | 42°F (6°C) | 3.6 in | Coldest |
| March | 47°F (8°C) | 6.1 in | |
| April | 55°F (13°C) | 7.0 in | |
| May | 62°F (17°C) | 7.4 in | |
| June | 68°F (20°C) | 10.4 in | Wettest |
| July | 74°F (23°C) | 8.2 in | |
| August | 77°F (25°C) | 9.5 in | Warmest |
| September | 72°F (22°C) | 9.8 in | |
| October | 63°F (17°C) | 7.6 in | |
| November | 55°F (13°C) | 4.9 in | |
| December | 47°F (8°C) | 2.8 in | Driest |
Kōchi has a seasonal temperature swing of 35°F / from 42°F in February to 77°F in August. Total annual precipitation is 80.2 inches, with June being the wettest month (10.4") and December the driest (2.8").