Koshi, Japan
Full City Profile
11,081
Population
29/sq mi density
308 ft
Elevation
94 meters
52°F
Avg Temperature
11°C
Koshi experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 31°F in January while summers reach 73°F in July. Annual precipitation totals 72.0 inches. The area receives 11.7 inches of snow annually.
Temperature
31°F Jan (-0°C)
73°F Jul (23°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 308 ft (94 m) |
| Area | 381.6 sq mi (988.4 km²) |
| Population Density | 29/sq mi |
| Coordinates | 36.9059°N, 137.5713°E |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
14 tsunamis recorded within 500 km. Highest wave on record: 11.3 m (37 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2024 | HONSHU: W COAST | Eruption + Earthquake | 11.3 m | 549 | 70 km |
| 1993 | HONSHU ISLAND | Earthquake | 0.5 m | - | 86 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 66 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 74 km |
| 2007 | HONSHU: W COAST | Earthquake | 0.1 m | 1 | 99 km |
| 2007 | HONSHU: W COAST | Earthquake | - | 15 | 109 km |
| 1892 | SW. HONSHU ISLAND | Earthquake | - | 1 | 69 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | - | 19 | 109 km |
| 1799 | SW. HONSHU ISLAND | Earthquake | - | - | 93 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 57 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 76 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 86 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 81 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 44 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Midagahara (37 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 37 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 41 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 48 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 55 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 76 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 88 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 89 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 91 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 102 km |
| Hakusan | Stratovolcano | 2,702 m (8,865 ft) | 1659 | 110 km |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 113 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 113 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 124 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 150 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 152 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 6.8 in | |
| February | 31°F (-0°C) | 4.9 in | Coldest |
| March | 37°F (3°C) | 4.7 in | |
| April | 49°F (9°C) | 4.3 in | Driest |
| May | 58°F (15°C) | 4.4 in | |
| June | 66°F (19°C) | 6.7 in | |
| July | 73°F (23°C) | 7.7 in | |
| August | 76°F (24°C) | 5.8 in | Warmest |
| September | 68°F (20°C) | 8.3 in | Wettest |
| October | 57°F (14°C) | 5.7 in | |
| November | 46°F (8°C) | 6.1 in | |
| December | 37°F (3°C) | 6.7 in |
Koshi has a seasonal temperature swing of 45°F / from 31°F in February to 76°F in August. Total annual precipitation is 72.0 inches, with September being the wettest month (8.3") and April the driest (4.3").